forked from OSchip/llvm-project
277 lines
6.8 KiB
LLVM
277 lines
6.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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; A == B implies A >u B is false.
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define void @test1(i32 %a, i32 %b) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 10)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp eq i32 %a, %b
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br i1 %cmp1, label %taken, label %end
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taken:
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%cmp2 = icmp ugt i32 %a, %b
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%c = select i1 %cmp2, i32 0, i32 10
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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; If A == B is false then A != B is true.
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define void @test2(i32 %a, i32 %b) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[END:%.*]], label [[TAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 20)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp eq i32 %a, %b
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br i1 %cmp1, label %end, label %taken
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taken:
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%cmp2 = icmp ne i32 %a, %b
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%c = select i1 %cmp2, i32 20, i32 0
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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; A >u 10 implies A >u 10 is true.
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define void @test3(i32 %a) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[A:%.*]], 10
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; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 30)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp ugt i32 %a, 10
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br i1 %cmp1, label %taken, label %end
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taken:
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%cmp2 = icmp ugt i32 %a, 10
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%c = select i1 %cmp2, i32 30, i32 0
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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define i8 @PR23333(i8 addrspace(1)* %ptr) {
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; CHECK-LABEL: @PR23333(
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; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 addrspace(1)* [[PTR:%.*]], null
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; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[END:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: ret i8 1
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; CHECK: end:
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; CHECK-NEXT: ret i8 0
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;
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%cmp = icmp eq i8 addrspace(1)* %ptr, null
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br i1 %cmp, label %taken, label %end
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taken:
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%cmp2 = icmp ne i8 addrspace(1)* %ptr, null
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%res = select i1 %cmp2, i8 2, i8 1
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ret i8 %res
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end:
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ret i8 0
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}
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; We know the condition of the select is true based on a dominating condition.
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; Therefore, we can replace %cond with %len.
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; TODO: len == 8 is known false in bb. This is handled by other passes, but should it be handled here?
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define void @test4(i32 %len) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = call i32 @bar(i32 [[LEN:%.*]])
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; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[LEN]], 4
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; CHECK-NEXT: br i1 [[CMP]], label [[BB:%.*]], label [[B1:%.*]]
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; CHECK: bb:
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; CHECK-NEXT: [[CMP11:%.*]] = icmp eq i32 [[LEN]], 8
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; CHECK-NEXT: br i1 [[CMP11]], label [[B0:%.*]], label [[B1]]
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; CHECK: b0:
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; CHECK-NEXT: call void @foo(i32 [[LEN]])
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; CHECK-NEXT: br label [[B1]]
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; CHECK: b1:
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; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[LEN]], [[BB]] ], [ undef, [[B0]] ], [ [[TMP0]], [[ENTRY:%.*]] ]
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; CHECK-NEXT: br label [[RET:%.*]]
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; CHECK: ret:
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; CHECK-NEXT: call void @foo(i32 [[TMP1]])
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = call i32 @bar(i32 %len);
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%cmp = icmp ult i32 %len, 4
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br i1 %cmp, label %bb, label %b1
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bb:
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%cond = select i1 %cmp, i32 %len, i32 8
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%cmp11 = icmp eq i32 %cond, 8
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br i1 %cmp11, label %b0, label %b1
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b0:
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call void @foo(i32 %len)
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br label %b1
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b1:
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%1 = phi i32 [ %cond, %bb ], [ undef, %b0 ], [ %0, %entry ]
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br label %ret
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ret:
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call void @foo(i32 %1)
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ret void
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}
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; A >u 10 implies A >u 9 is true.
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define void @test5(i32 %a) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[A:%.*]], 10
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; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 30)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp ugt i32 %a, 10
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br i1 %cmp1, label %taken, label %end
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taken:
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%cmp2 = icmp ugt i32 %a, 9
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%c = select i1 %cmp2, i32 30, i32 0
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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declare void @foo(i32)
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declare i32 @bar(i32)
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define i32 @test_and(i32 %a, i32 %b) {
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; CHECK-LABEL: @test_and(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[A:%.*]], 0
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; CHECK-NEXT: [[CMP2:%.*]] = icmp ne i32 [[B:%.*]], 0
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; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP1]], [[CMP2]]
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; CHECK-NEXT: br i1 [[AND]], label [[TPATH:%.*]], label [[END:%.*]]
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; CHECK: tpath:
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; CHECK-NEXT: ret i32 313
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; CHECK: end:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%cmp1 = icmp ne i32 %a, 0
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%cmp2 = icmp ne i32 %b, 0
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%and = and i1 %cmp1, %cmp2
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br i1 %and, label %tpath, label %end
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tpath:
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%cmp3 = icmp eq i32 %a, 0 ;; <-- implied false
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%c = select i1 %cmp3, i32 0, i32 313
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ret i32 %c
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end:
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ret i32 0
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}
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; cmp1 and cmp2 are false on the 'fpath' path and thus cmp3 is true.
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define i32 @test_or1(i32 %a, i32 %b) {
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; CHECK-LABEL: @test_or1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], 0
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; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[B:%.*]], 0
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; CHECK-NEXT: [[OR:%.*]] = or i1 [[CMP1]], [[CMP2]]
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; CHECK-NEXT: br i1 [[OR]], label [[END:%.*]], label [[FPATH:%.*]]
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; CHECK: fpath:
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; CHECK-NEXT: ret i32 37
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; CHECK: end:
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; CHECK-NEXT: ret i32 0
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;
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entry:
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%cmp1 = icmp eq i32 %a, 0
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%cmp2 = icmp eq i32 %b, 0
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%or = or i1 %cmp1, %cmp2
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br i1 %or, label %end, label %fpath
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fpath:
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%cmp3 = icmp ne i32 %a, 0 ;; <-- implied true
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%c = select i1 %cmp3, i32 37, i32 0
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ret i32 %c
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end:
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ret i32 0
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}
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; LHS ==> RHS by definition (true -> true)
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define void @test6(i32 %a, i32 %b) {
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 10)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp eq i32 %a, %b
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br i1 %cmp1, label %taken, label %end
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taken:
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%c = select i1 %cmp1, i32 10, i32 0
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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; LHS ==> RHS by definition (false -> false)
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define void @test7(i32 %a, i32 %b) {
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; CHECK-LABEL: @test7(
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; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: br i1 [[CMP1]], label [[END:%.*]], label [[TAKEN:%.*]]
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; CHECK: taken:
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; CHECK-NEXT: call void @foo(i32 11)
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; CHECK-NEXT: br label [[END]]
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; CHECK: end:
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; CHECK-NEXT: ret void
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;
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%cmp1 = icmp eq i32 %a, %b
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br i1 %cmp1, label %end, label %taken
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taken:
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%c = select i1 %cmp1, i32 0, i32 11
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call void @foo(i32 %c)
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br label %end
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end:
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ret void
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}
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