110 lines
3.0 KiB
LLVM
110 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -S -simplifycfg -simplifycfg-require-and-preserve-domtree=1 | FileCheck %s
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; Check for when one branch implies the value of a successors conditional and
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; it's not simply the same conditional repeated.
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define void @test(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: [[IPLUS1:%.*]] = add nsw i32 [[I:%.*]], 1
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[IPLUS1]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: br i1 [[VAR29]], label [[IN_BOUNDS:%.*]], label [[OUT_OF_BOUNDS:%.*]]
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; CHECK: in_bounds:
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; CHECK-NEXT: ret void
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; CHECK: out_of_bounds:
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; CHECK-NEXT: call void @foo(i64 0)
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; CHECK-NEXT: unreachable
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;
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%iplus1 = add nsw i32 %i, 1
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%var29 = icmp slt i32 %iplus1, %length.i
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br i1 %var29, label %next, label %out_of_bounds
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next:
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%var30 = icmp slt i32 %i, %length.i
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br i1 %var30, label %in_bounds, label %out_of_bounds2
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in_bounds:
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ret void
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out_of_bounds:
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call void @foo(i64 0)
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unreachable
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out_of_bounds2:
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call void @foo(i64 1)
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unreachable
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}
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; If the add is not nsw, it's not safe to use the fact about i+1 to imply the
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; i condition since it could have overflowed.
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define void @test_neg(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test_neg(
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; CHECK-NEXT: [[IPLUS1:%.*]] = add i32 [[I:%.*]], 1
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[IPLUS1]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: br i1 [[VAR29]], label [[NEXT:%.*]], label [[OUT_OF_BOUNDS:%.*]]
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; CHECK: next:
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; CHECK-NEXT: [[VAR30:%.*]] = icmp slt i32 [[I]], [[LENGTH_I]]
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; CHECK-NEXT: br i1 [[VAR30]], label [[IN_BOUNDS:%.*]], label [[OUT_OF_BOUNDS2:%.*]]
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; CHECK: in_bounds:
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; CHECK-NEXT: ret void
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; CHECK: out_of_bounds:
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; CHECK-NEXT: call void @foo(i64 0)
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; CHECK-NEXT: unreachable
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; CHECK: out_of_bounds2:
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; CHECK-NEXT: call void @foo(i64 1)
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; CHECK-NEXT: unreachable
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;
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%iplus1 = add i32 %i, 1
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%var29 = icmp slt i32 %iplus1, %length.i
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br i1 %var29, label %next, label %out_of_bounds
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next:
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%var30 = icmp slt i32 %i, %length.i
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br i1 %var30, label %in_bounds, label %out_of_bounds2
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in_bounds:
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ret void
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out_of_bounds:
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call void @foo(i64 0)
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unreachable
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out_of_bounds2:
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call void @foo(i64 1)
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unreachable
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}
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define void @test2(i32 %length.i, i32 %i) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[IPLUS100:%.*]] = add nsw i32 [[I:%.*]], 100
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; CHECK-NEXT: [[VAR29:%.*]] = icmp slt i32 [[IPLUS100]], [[LENGTH_I:%.*]]
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; CHECK-NEXT: br i1 [[VAR29]], label [[IN_BOUNDS:%.*]], label [[OUT_OF_BOUNDS:%.*]]
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; CHECK: in_bounds:
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; CHECK-NEXT: ret void
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; CHECK: out_of_bounds:
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; CHECK-NEXT: call void @foo(i64 0)
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; CHECK-NEXT: unreachable
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;
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%iplus100 = add nsw i32 %i, 100
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%var29 = icmp slt i32 %iplus100, %length.i
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br i1 %var29, label %next, label %out_of_bounds
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next:
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%var30 = icmp slt i32 %i, %length.i
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br i1 %var30, label %in_bounds, label %out_of_bounds2
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in_bounds:
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ret void
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out_of_bounds:
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call void @foo(i64 0)
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unreachable
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out_of_bounds2:
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call void @foo(i64 1)
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unreachable
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}
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declare void @foo(i64)
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