655 lines
23 KiB
LLVM
655 lines
23 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -jump-threading < %s | FileCheck %s
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declare void @foo()
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declare void @bar()
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declare void @baz()
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declare void @quux()
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; Jump threading of branch with select as condition.
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; Mostly theoretical since instruction combining simplifies all selects of
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; booleans where at least one operand is true/false/undef.
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define void @test_br(i1 %cond, i1 %value) nounwind {
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; CHECK-LABEL: @test_br(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L0:%.*]]
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; CHECK: L0:
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; CHECK-NEXT: call void @baz()
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; CHECK-NEXT: [[EXPR:%.*]] = select i1 [[COND]], i1 true, i1 [[VALUE:%.*]]
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; CHECK-NEXT: br i1 [[EXPR]], label [[L1]], label [[L2:%.*]]
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; CHECK: L1:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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; CHECK: L2:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %L0, label %L3
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L0:
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%expr = select i1 %cond, i1 true, i1 %value
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br i1 %expr, label %L1, label %L2
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L1:
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call void @foo()
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ret void
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L2:
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call void @bar()
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ret void
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L3:
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call void @baz()
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br label %L0
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}
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; Jump threading of switch with select as condition.
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define void @test_switch(i1 %cond, i8 %value) nounwind {
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; CHECK-LABEL: @test_switch(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L0:%.*]]
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; CHECK: L0:
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; CHECK-NEXT: call void @quux()
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; CHECK-NEXT: [[EXPR:%.*]] = select i1 [[COND]], i8 1, i8 [[VALUE:%.*]]
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; CHECK-NEXT: switch i8 [[EXPR]], label [[L3:%.*]] [
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; CHECK-NEXT: i8 1, label [[L1]]
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; CHECK-NEXT: i8 2, label [[L2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: L1:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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; CHECK: L2:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: ret void
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; CHECK: L3:
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; CHECK-NEXT: call void @baz()
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %L0, label %L4
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L0:
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%expr = select i1 %cond, i8 1, i8 %value
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switch i8 %expr, label %L3 [i8 1, label %L1 i8 2, label %L2]
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L1:
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call void @foo()
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ret void
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L2:
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call void @bar()
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ret void
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L3:
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call void @baz()
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ret void
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L4:
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call void @quux()
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br label %L0
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}
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; Make sure the blocks in the indirectbr test aren't trivially removable as
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; successors by taking their addresses.
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@anchor = constant [3 x i8*] [
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i8* blockaddress(@test_indirectbr, %L1),
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i8* blockaddress(@test_indirectbr, %L2),
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i8* blockaddress(@test_indirectbr, %L3)
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]
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; Jump threading of indirectbr with select as address.
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define void @test_indirectbr(i1 %cond, i8* %address) nounwind {
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; CHECK-LABEL: @test_indirectbr(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L3:%.*]]
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; CHECK: L1:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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; CHECK: L3:
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; CHECK-NEXT: call void @baz()
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %L0, label %L3
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L0:
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%indirect.goto.dest = select i1 %cond, i8* blockaddress(@test_indirectbr, %L1), i8* %address
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indirectbr i8* %indirect.goto.dest, [label %L1, label %L2, label %L3]
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L1:
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call void @foo()
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ret void
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L2:
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call void @bar()
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ret void
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L3:
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call void @baz()
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ret void
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}
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; Jump threading of indirectbr with select as address. Test increased
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; duplication threshold for cases where indirectbr is being threaded
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; through.
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define void @test_indirectbr_thresh(i1 %cond, i8* %address) nounwind {
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; CHECK-LABEL: @test_indirectbr_thresh(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[L1:%.*]], label [[L3:%.*]]
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; CHECK: L1:
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; CHECK-NEXT: call void @quux()
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; CHECK-NEXT: call void @quux()
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; CHECK-NEXT: call void @quux()
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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; CHECK: L3:
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; CHECK-NEXT: call void @baz()
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; CHECK-NEXT: ret void
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;
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entry:
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br i1 %cond, label %L0, label %L3
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L0:
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%indirect.goto.dest = select i1 %cond, i8* blockaddress(@test_indirectbr_thresh, %L1), i8* %address
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call void @quux()
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call void @quux()
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call void @quux()
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indirectbr i8* %indirect.goto.dest, [label %L1, label %L2, label %L3]
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L1:
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call void @foo()
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ret void
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L2:
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call void @bar()
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ret void
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L3:
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call void @baz()
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ret void
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}
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; A more complicated case: the condition is a select based on a comparison.
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define void @test_switch_cmp(i1 %cond, i32 %val, i8 %value) nounwind {
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; CHECK-LABEL: @test_switch_cmp(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[L0:%.*]], label [[L0_THREAD:%.*]]
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; CHECK: L0:
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; CHECK-NEXT: [[VAL_PHI:%.*]] = phi i32 [ [[VAL:%.*]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[VAL_PHI]], 0
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; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[CMP]]
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; CHECK-NEXT: br i1 [[COND_FR]], label [[L1:%.*]], label [[TMP0:%.*]]
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; CHECK: 0:
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; CHECK-NEXT: [[TMP1:%.*]] = phi i8 [ [[VALUE:%.*]], [[L0]] ]
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; CHECK-NEXT: switch i8 [[TMP1]], label [[L3:%.*]] [
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; CHECK-NEXT: i8 1, label [[L1]]
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; CHECK-NEXT: i8 2, label [[L2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: L1:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: ret void
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; CHECK: L2:
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: ret void
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; CHECK: L3:
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; CHECK-NEXT: call void @baz()
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; CHECK-NEXT: ret void
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; CHECK: L0.thread:
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; CHECK-NEXT: call void @quux()
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; CHECK-NEXT: br label [[L1]]
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;
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entry:
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br i1 %cond, label %L0, label %L4
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L0:
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%val.phi = phi i32 [%val, %entry], [-1, %L4]
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%cmp = icmp slt i32 %val.phi, 0
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%expr = select i1 %cmp, i8 1, i8 %value
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switch i8 %expr, label %L3 [i8 1, label %L1 i8 2, label %L2]
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L1:
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call void @foo()
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ret void
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L2:
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call void @bar()
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ret void
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L3:
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call void @baz()
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ret void
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L4:
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call void @quux()
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br label %L0
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}
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; Make sure the edge value of %0 from entry to L2 includes 0 and L3 is
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; reachable.
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define void @test_switch_default(i32* nocapture %status) nounwind {
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; CHECK-LABEL: @test_switch_default(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = load i32, i32* [[STATUS:%.*]], align 4
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; CHECK-NEXT: switch i32 [[TMP0]], label [[L2:%.*]] [
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; CHECK-NEXT: i32 5061, label [[L2_THREAD:%.*]]
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; CHECK-NEXT: i32 0, label [[L2]]
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; CHECK-NEXT: ]
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; CHECK: L2.thread:
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; CHECK-NEXT: store i32 10025, i32* [[STATUS]], align 4
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; CHECK-NEXT: br label [[L4:%.*]]
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; CHECK: L2:
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; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[TMP0]], [[ENTRY:%.*]] ], [ [[TMP0]], [[ENTRY]] ]
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; CHECK-NEXT: [[CMP57_I:%.*]] = icmp eq i32 [[TMP1]], 0
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; CHECK-NEXT: br i1 [[CMP57_I]], label [[L3:%.*]], label [[L4]]
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; CHECK: L3:
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; CHECK-NEXT: store i32 10000, i32* [[STATUS]], align 4
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; CHECK-NEXT: br label [[L4]]
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; CHECK: L4:
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = load i32, i32* %status, align 4
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switch i32 %0, label %L2 [
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i32 5061, label %L1
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i32 0, label %L2
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]
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L1:
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store i32 10025, i32* %status, align 4
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br label %L2
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L2:
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%1 = load i32, i32* %status, align 4
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%cmp57.i = icmp eq i32 %1, 0
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br i1 %cmp57.i, label %L3, label %L4
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L3:
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store i32 10000, i32* %status, align 4
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br label %L4
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L4:
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ret void
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}
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define void @unfold1(double %x, double %y) nounwind {
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; CHECK-LABEL: @unfold1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB:%.*]] = fsub double [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = fcmp ogt double [[SUB]], 1.000000e+01
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; CHECK-NEXT: br i1 [[CMP]], label [[COND_END4:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: [[ADD:%.*]] = fadd double [[X]], [[Y]]
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; CHECK-NEXT: [[CMP1:%.*]] = fcmp ogt double [[ADD]], 1.000000e+01
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; CHECK-NEXT: br i1 [[CMP1]], label [[COND_END4]], label [[IF_THEN:%.*]]
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; CHECK: cond.end4:
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; CHECK-NEXT: [[COND5:%.*]] = phi double [ [[SUB]], [[ENTRY:%.*]] ], [ [[ADD]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[CMP6:%.*]] = fcmp oeq double [[COND5]], 0.000000e+00
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; CHECK-NEXT: br i1 [[CMP6]], label [[IF_THEN]], label [[IF_END:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub = fsub double %x, %y
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%cmp = fcmp ogt double %sub, 1.000000e+01
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br i1 %cmp, label %cond.end4, label %cond.false
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cond.false: ; preds = %entry
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%add = fadd double %x, %y
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%cmp1 = fcmp ogt double %add, 1.000000e+01
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%add. = select i1 %cmp1, double %add, double 0.000000e+00
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br label %cond.end4
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cond.end4: ; preds = %entry, %cond.false
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%cond5 = phi double [ %add., %cond.false ], [ %sub, %entry ]
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%cmp6 = fcmp oeq double %cond5, 0.000000e+00
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br i1 %cmp6, label %if.then, label %if.end
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if.then: ; preds = %cond.end4
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call void @foo()
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br label %if.end
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if.end: ; preds = %if.then, %cond.end4
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ret void
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}
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define void @unfold2(i32 %x, i32 %y) nounwind {
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; CHECK-LABEL: @unfold2(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[SUB]], 10
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; CHECK-NEXT: br i1 [[CMP]], label [[IF_END:%.*]], label [[COND_FALSE:%.*]]
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; CHECK: cond.false:
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; CHECK-NEXT: [[ADD:%.*]] = add nsw i32 [[X]], [[Y]]
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; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[ADD]], 10
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; CHECK-NEXT: br i1 [[CMP1]], label [[IF_THEN:%.*]], label [[COND_END4:%.*]]
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; CHECK: cond.end4:
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; CHECK-NEXT: [[COND5:%.*]] = phi i32 [ [[ADD]], [[COND_FALSE]] ]
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; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[COND5]], 0
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; CHECK-NEXT: br i1 [[CMP6]], label [[IF_THEN]], label [[IF_END]]
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; CHECK: if.then:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[IF_END]]
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; CHECK: if.end:
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; CHECK-NEXT: ret void
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;
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entry:
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%sub = sub nsw i32 %x, %y
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%cmp = icmp sgt i32 %sub, 10
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br i1 %cmp, label %cond.end4, label %cond.false
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cond.false: ; preds = %entry
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%add = add nsw i32 %x, %y
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%cmp1 = icmp sgt i32 %add, 10
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%add. = select i1 %cmp1, i32 0, i32 %add
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br label %cond.end4
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cond.end4: ; preds = %entry, %cond.false
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%cond5 = phi i32 [ %add., %cond.false ], [ %sub, %entry ]
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%cmp6 = icmp eq i32 %cond5, 0
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br i1 %cmp6, label %if.then, label %if.end
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if.then: ; preds = %cond.end4
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call void @foo()
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br label %if.end
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if.end: ; preds = %if.then, %cond.end4
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ret void
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}
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define i32 @unfold3(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
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; CHECK-LABEL: @unfold3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
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; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
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; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD4:%.*]], label [[COND_FALSE_I:%.*]]
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; CHECK: cond.false.i:
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; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
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; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_6_I:%.*]]
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; CHECK: cond.false.6.i:
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; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
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; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD4]], label [[COND_FALSE_10_I:%.*]]
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; CHECK: cond.false.10.i:
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; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
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; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD]], label [[DOTEXIT:%.*]]
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; CHECK: .exit:
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; CHECK-NEXT: [[PHITMP:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
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; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[PHITMP]]
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; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD4]]
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; CHECK: .exit.thread:
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; CHECK-NEXT: br label [[DOTEXIT_THREAD4]]
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; CHECK: .exit.thread4:
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; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[ENTRY:%.*]] ], [ [[ADD3]], [[COND_FALSE_6_I]] ]
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; CHECK-NEXT: ret i32 [[TMP0]]
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;
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entry:
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%add3 = add nsw i32 %j, 2
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%cmp.i = icmp slt i32 %u, %v
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br i1 %cmp.i, label %.exit, label %cond.false.i
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cond.false.i: ; preds = %entry
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%cmp4.i = icmp sgt i32 %u, %v
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br i1 %cmp4.i, label %.exit, label %cond.false.6.i
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cond.false.6.i: ; preds = %cond.false.i
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%cmp8.i = icmp slt i32 %w, %x
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br i1 %cmp8.i, label %.exit, label %cond.false.10.i
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cond.false.10.i: ; preds = %cond.false.6.i
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%cmp13.i = icmp sgt i32 %w, %x
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br i1 %cmp13.i, label %.exit, label %cond.false.15.i
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cond.false.15.i: ; preds = %cond.false.10.i
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%phitmp = icmp sge i32 %y, %z
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br label %.exit
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.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
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%cond23.i = phi i1 [ false, %entry ], [ true, %cond.false.i ], [ false, %cond.false.6.i ], [ %phitmp, %cond.false.15.i ], [ true, %cond.false.10.i ]
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%j.add3 = select i1 %cond23.i, i32 %j, i32 %add3
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ret i32 %j.add3
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}
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define i32 @unfold4(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
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; CHECK-LABEL: @unfold4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
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; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
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; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT_THREAD:%.*]], label [[COND_FALSE_I:%.*]]
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; CHECK: cond.false.i:
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; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
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; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT_THREAD5:%.*]], label [[COND_FALSE_6_I:%.*]]
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; CHECK: cond.false.6.i:
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; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
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; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT_THREAD]], label [[COND_FALSE_10_I:%.*]]
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; CHECK: cond.false.10.i:
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; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
|
|
; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT_THREAD5]], label [[DOTEXIT:%.*]]
|
|
; CHECK: .exit:
|
|
; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
|
|
; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32
|
|
; CHECK-NEXT: [[LNOT_I18:%.*]] = icmp eq i32 [[CONV]], 1
|
|
; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[LNOT_I18]]
|
|
; CHECK-NEXT: br i1 [[COND_FR]], label [[DOTEXIT_THREAD]], label [[DOTEXIT_THREAD5]]
|
|
; CHECK: .exit.thread:
|
|
; CHECK-NEXT: br label [[DOTEXIT_THREAD5]]
|
|
; CHECK: .exit.thread5:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[DOTEXIT_THREAD]] ], [ [[ADD3]], [[DOTEXIT]] ], [ [[ADD3]], [[COND_FALSE_I]] ], [ [[ADD3]], [[COND_FALSE_10_I]] ]
|
|
; CHECK-NEXT: ret i32 [[TMP0]]
|
|
;
|
|
entry:
|
|
%add3 = add nsw i32 %j, 2
|
|
%cmp.i = icmp slt i32 %u, %v
|
|
br i1 %cmp.i, label %.exit, label %cond.false.i
|
|
|
|
cond.false.i: ; preds = %entry
|
|
%cmp4.i = icmp sgt i32 %u, %v
|
|
br i1 %cmp4.i, label %.exit, label %cond.false.6.i
|
|
|
|
cond.false.6.i: ; preds = %cond.false.i
|
|
%cmp8.i = icmp slt i32 %w, %x
|
|
br i1 %cmp8.i, label %.exit, label %cond.false.10.i
|
|
|
|
cond.false.10.i: ; preds = %cond.false.6.i
|
|
%cmp13.i = icmp sgt i32 %w, %x
|
|
br i1 %cmp13.i, label %.exit, label %cond.false.15.i
|
|
|
|
cond.false.15.i: ; preds = %cond.false.10.i
|
|
%cmp19.i = icmp sge i32 %y, %z
|
|
%conv = zext i1 %cmp19.i to i32
|
|
br label %.exit
|
|
|
|
.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
|
|
%cond23.i = phi i32 [ 1, %entry ], [ 0, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 0, %cond.false.10.i ]
|
|
%lnot.i18 = icmp eq i32 %cond23.i, 1
|
|
%j.add3 = select i1 %lnot.i18, i32 %j, i32 %add3
|
|
ret i32 %j.add3
|
|
|
|
}
|
|
|
|
define i32 @unfold5(i32 %u, i32 %v, i32 %w, i32 %x, i32 %y, i32 %z, i32 %j) nounwind {
|
|
; CHECK-LABEL: @unfold5(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[ADD3:%.*]] = add nsw i32 [[J:%.*]], 2
|
|
; CHECK-NEXT: [[CMP_I:%.*]] = icmp slt i32 [[U:%.*]], [[V:%.*]]
|
|
; CHECK-NEXT: br i1 [[CMP_I]], label [[DOTEXIT:%.*]], label [[COND_FALSE_I:%.*]]
|
|
; CHECK: cond.false.i:
|
|
; CHECK-NEXT: [[CMP4_I:%.*]] = icmp sgt i32 [[U]], [[V]]
|
|
; CHECK-NEXT: br i1 [[CMP4_I]], label [[DOTEXIT]], label [[COND_FALSE_6_I:%.*]]
|
|
; CHECK: cond.false.6.i:
|
|
; CHECK-NEXT: [[CMP8_I:%.*]] = icmp slt i32 [[W:%.*]], [[X:%.*]]
|
|
; CHECK-NEXT: br i1 [[CMP8_I]], label [[DOTEXIT]], label [[COND_FALSE_10_I:%.*]]
|
|
; CHECK: cond.false.10.i:
|
|
; CHECK-NEXT: [[CMP13_I:%.*]] = icmp sgt i32 [[W]], [[X]]
|
|
; CHECK-NEXT: br i1 [[CMP13_I]], label [[DOTEXIT]], label [[COND_FALSE_15_I:%.*]]
|
|
; CHECK: cond.false.15.i:
|
|
; CHECK-NEXT: [[CMP19_I:%.*]] = icmp sge i32 [[Y:%.*]], [[Z:%.*]]
|
|
; CHECK-NEXT: [[CONV:%.*]] = zext i1 [[CMP19_I]] to i32
|
|
; CHECK-NEXT: br label [[DOTEXIT]]
|
|
; CHECK: .exit:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = phi i32 [ [[J]], [[COND_FALSE_10_I]] ], [ [[CONV]], [[COND_FALSE_15_I]] ], [ 1, [[COND_FALSE_6_I]] ], [ 3, [[COND_FALSE_I]] ], [ 2, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 [[TMP0]]
|
|
;
|
|
entry:
|
|
%add3 = add nsw i32 %j, 2
|
|
%cmp.i = icmp slt i32 %u, %v
|
|
br i1 %cmp.i, label %.exit, label %cond.false.i
|
|
|
|
cond.false.i: ; preds = %entry
|
|
%cmp4.i = icmp sgt i32 %u, %v
|
|
br i1 %cmp4.i, label %.exit, label %cond.false.6.i
|
|
|
|
cond.false.6.i: ; preds = %cond.false.i
|
|
%cmp8.i = icmp slt i32 %w, %x
|
|
br i1 %cmp8.i, label %.exit, label %cond.false.10.i
|
|
|
|
cond.false.10.i: ; preds = %cond.false.6.i
|
|
%cmp13.i = icmp sgt i32 %w, %x
|
|
br i1 %cmp13.i, label %.exit, label %cond.false.15.i
|
|
|
|
cond.false.15.i: ; preds = %cond.false.10.i
|
|
%cmp19.i = icmp sge i32 %y, %z
|
|
%conv = zext i1 %cmp19.i to i32
|
|
br label %.exit
|
|
|
|
.exit: ; preds = %entry, %cond.false.i, %cond.false.6.i, %cond.false.10.i, %cond.false.15.i
|
|
%cond23.i = phi i32 [ 2, %entry ], [ 3, %cond.false.i ], [ 1, %cond.false.6.i ], [ %conv, %cond.false.15.i ], [ 7, %cond.false.10.i ]
|
|
%lnot.i18 = icmp sgt i32 %cond23.i, 5
|
|
%j.add3 = select i1 %lnot.i18, i32 %j, i32 %cond23.i
|
|
ret i32 %j.add3
|
|
|
|
}
|
|
|
|
; When a select has a constant operand in one branch, and it feeds a phi node
|
|
; and the phi node feeds a switch we unfold the select
|
|
define void @test_func(i32* nocapture readonly %a, i32* nocapture readonly %b, i32* nocapture readonly %c, i32 %n) local_unnamed_addr #0 {
|
|
; CHECK-LABEL: @test_func(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br label [[FOR_COND:%.*]]
|
|
; CHECK: for.cond:
|
|
; CHECK-NEXT: [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[SW_DEFAULT:%.*]] ]
|
|
; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I_0]], [[N:%.*]]
|
|
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY:%.*]], label [[FOR_COND_CLEANUP:%.*]]
|
|
; CHECK: for.cond.cleanup:
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: for.body:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = zext i32 [[I_0]] to i64
|
|
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, i32* [[A:%.*]], i64 [[TMP0]]
|
|
; CHECK-NEXT: [[TMP1:%.*]] = load i32, i32* [[ARRAYIDX]], align 4
|
|
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[TMP1]], 4
|
|
; CHECK-NEXT: br i1 [[CMP1]], label [[LAND_LHS_TRUE:%.*]], label [[IF_END:%.*]]
|
|
; CHECK: land.lhs.true:
|
|
; CHECK-NEXT: [[ARRAYIDX3:%.*]] = getelementptr inbounds i32, i32* [[B:%.*]], i64 [[TMP0]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = load i32, i32* [[ARRAYIDX3]], align 4
|
|
; CHECK-NEXT: [[ARRAYIDX5:%.*]] = getelementptr inbounds i32, i32* [[C:%.*]], i64 [[TMP0]]
|
|
; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[ARRAYIDX5]], align 4
|
|
; CHECK-NEXT: [[CMP6:%.*]] = icmp eq i32 [[TMP2]], [[TMP3]]
|
|
; CHECK-NEXT: br i1 [[CMP6]], label [[SW_BB:%.*]], label [[SW_BB7:%.*]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: [[LOCAL_VAR_0:%.*]] = phi i32 [ [[TMP1]], [[FOR_BODY]] ]
|
|
; CHECK-NEXT: switch i32 [[LOCAL_VAR_0]], label [[SW_DEFAULT]] [
|
|
; CHECK-NEXT: i32 2, label [[SW_BB]]
|
|
; CHECK-NEXT: i32 4, label [[SW_BB7]]
|
|
; CHECK-NEXT: i32 5, label [[SW_BB8:%.*]]
|
|
; CHECK-NEXT: i32 7, label [[SW_BB9:%.*]]
|
|
; CHECK-NEXT: ]
|
|
; CHECK: sw.bb:
|
|
; CHECK-NEXT: call void @foo()
|
|
; CHECK-NEXT: br label [[SW_BB7]]
|
|
; CHECK: sw.bb7:
|
|
; CHECK-NEXT: call void @bar()
|
|
; CHECK-NEXT: br label [[SW_BB8]]
|
|
; CHECK: sw.bb8:
|
|
; CHECK-NEXT: call void @baz()
|
|
; CHECK-NEXT: br label [[SW_BB9]]
|
|
; CHECK: sw.bb9:
|
|
; CHECK-NEXT: call void @quux()
|
|
; CHECK-NEXT: br label [[SW_DEFAULT]]
|
|
; CHECK: sw.default:
|
|
; CHECK-NEXT: call void @baz()
|
|
; CHECK-NEXT: [[INC]] = add nuw nsw i32 [[I_0]], 1
|
|
; CHECK-NEXT: br label [[FOR_COND]]
|
|
;
|
|
entry:
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %sw.default, %entry
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %sw.default ]
|
|
%cmp = icmp slt i32 %i.0, %n
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
|
|
for.cond.cleanup: ; preds = %for.cond
|
|
ret void
|
|
|
|
for.body: ; preds = %for.cond
|
|
%0 = zext i32 %i.0 to i64
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i64 %0
|
|
%1 = load i32, i32* %arrayidx, align 4
|
|
%cmp1 = icmp eq i32 %1, 4
|
|
br i1 %cmp1, label %land.lhs.true, label %if.end
|
|
|
|
land.lhs.true: ; preds = %for.body
|
|
%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %0
|
|
%2 = load i32, i32* %arrayidx3, align 4
|
|
%arrayidx5 = getelementptr inbounds i32, i32* %c, i64 %0
|
|
%3 = load i32, i32* %arrayidx5, align 4
|
|
%cmp6 = icmp eq i32 %2, %3
|
|
%spec.select = select i1 %cmp6, i32 2, i32 4
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %land.lhs.true, %for.body
|
|
%local_var.0 = phi i32 [ %1, %for.body ], [ %spec.select, %land.lhs.true ]
|
|
switch i32 %local_var.0, label %sw.default [
|
|
i32 2, label %sw.bb
|
|
i32 4, label %sw.bb7
|
|
i32 5, label %sw.bb8
|
|
i32 7, label %sw.bb9
|
|
]
|
|
|
|
sw.bb: ; preds = %if.end
|
|
call void @foo()
|
|
br label %sw.bb7
|
|
|
|
sw.bb7: ; preds = %if.end, %sw.bb
|
|
call void @bar()
|
|
br label %sw.bb8
|
|
|
|
sw.bb8: ; preds = %if.end, %sw.bb7
|
|
call void @baz()
|
|
br label %sw.bb9
|
|
|
|
sw.bb9: ; preds = %if.end, %sw.bb8
|
|
call void @quux()
|
|
br label %sw.default
|
|
|
|
sw.default: ; preds = %if.end, %sw.bb9
|
|
call void @baz()
|
|
%inc = add nuw nsw i32 %i.0, 1
|
|
br label %for.cond
|
|
}
|
|
|
|
define i32 @TryToUnfoldSelectInCurrBB(i1 %b, i1 %ui, i32 %s, i1 %x) {
|
|
; CHECK-LABEL: @TryToUnfoldSelectInCurrBB(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: br i1 [[B:%.*]], label [[IF_END_THREAD:%.*]], label [[IF_END:%.*]]
|
|
; CHECK: if.end:
|
|
; CHECK-NEXT: [[COND_FR:%.*]] = freeze i1 [[X:%.*]]
|
|
; CHECK-NEXT: br i1 [[COND_FR]], label [[TMP0:%.*]], label [[IF_END_THREAD]]
|
|
; CHECK: 0:
|
|
; CHECK-NEXT: br label [[IF_END_THREAD]]
|
|
; CHECK: if.end.thread:
|
|
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[S:%.*]], [[TMP0]] ], [ 42, [[IF_END]] ], [ 42, [[ENTRY:%.*]] ]
|
|
; CHECK-NEXT: ret i32 [[TMP1]]
|
|
;
|
|
entry:
|
|
br i1 %b, label %if.end, label %if.else
|
|
|
|
if.else:
|
|
br label %if.end
|
|
|
|
if.end:
|
|
%v = phi i1 [ %x, %if.else ], [ false, %entry ]
|
|
%v1 = select i1 %v, i32 %s, i32 42
|
|
ret i32 %v1
|
|
}
|