2019-05-25 21:11:22 +08:00
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt %s -simplifycfg -instcombine -S | FileCheck %s
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define i32 @assume1(i32 %p) {
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; CHECK-LABEL: @assume1(
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; CHECK-NEXT: entry:
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[SimplifyCFG] Added condition assumption for unreachable blocks
Summary: PR41688
Reviewers: spatel, efriedma, craig.topper, hfinkel, reames
Reviewed By: hfinkel
Subscribers: javed.absar, dmgreen, fhahn, hfinkel, reames, nikic, lebedev.ri, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D61409
llvm-svn: 361707
2019-05-26 06:34:27 +08:00
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[P:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: ret i32 [[P]]
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2019-05-25 21:11:22 +08:00
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;
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entry:
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%cmp = icmp sle i32 %p, 0
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br i1 %cmp, label %if.then, label %if.end
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if.then:
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unreachable
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if.end:
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%call = call i32 @abs(i32 %p)
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ret i32 %call
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}
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define i32 @assume2(i32 %p) {
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; CHECK-LABEL: @assume2(
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; CHECK-NEXT: entry:
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[SimplifyCFG] Added condition assumption for unreachable blocks
Summary: PR41688
Reviewers: spatel, efriedma, craig.topper, hfinkel, reames
Reviewed By: hfinkel
Subscribers: javed.absar, dmgreen, fhahn, hfinkel, reames, nikic, lebedev.ri, llvm-commits
Tags: #llvm
Differential Revision: https://reviews.llvm.org/D61409
llvm-svn: 361707
2019-05-26 06:34:27 +08:00
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; CHECK-NEXT: [[CMP:%.*]] = icmp sgt i32 [[P:%.*]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[CMP]])
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; CHECK-NEXT: ret i32 [[P]]
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2019-05-25 21:11:22 +08:00
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;
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entry:
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%cmp = icmp sgt i32 %p, 0
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br i1 %cmp, label %if.then, label %if.else
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if.then:
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br label %if.end
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if.else:
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unreachable
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if.end:
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%call = call i32 @abs(i32 %p)
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ret i32 %call
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}
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declare i32 @abs(i32)
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