b280ee1dd7
Another step moving away from the deprecated syntax of specifying pass pipeline in opt. Differential Revision: https://reviews.llvm.org/D119080
35 lines
1.2 KiB
LLVM
35 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
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; The first comparison (a != b) should not be dropped
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define i1 @test1(i8* %a, i8* %b) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: [[COND1:%.*]] = icmp ne i8* [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[A2:%.*]] = getelementptr inbounds i8, i8* [[A]], i64 -1
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; CHECK-NEXT: [[COND2:%.*]] = icmp ugt i8* [[A2]], [[B]]
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND1]], i1 [[COND2]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%cond1 = icmp ne i8* %a, %b
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%a2 = getelementptr inbounds i8, i8* %a, i64 -1
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%cond2 = icmp ugt i8* %a2, %b
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%res = select i1 %cond1, i1 %cond2, i1 false
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ret i1 %res
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}
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; The first comparison (a != b) should not be dropped
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define i1 @test2(i32 %a, i32 %b) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: [[COND1:%.*]] = icmp ne i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[A2:%.*]] = add nuw i32 [[A]], 1
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; CHECK-NEXT: [[COND2:%.*]] = icmp ult i32 [[A2]], [[B]]
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND1]], i1 [[COND2]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%cond1 = icmp ne i32 %a, %b
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%a2 = add nuw i32 %a, 1
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%cond2 = icmp ult i32 %a2, %b
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%res = select i1 %cond1, i1 %cond2, i1 false
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ret i1 %res
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}
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