7a1029fd1e
Relanded since the buildbot issue was unrelated to this commit. When hoisting simple values out from a loop, and an optsize attribute, a convergent call, or an invoke instruction hindered the pass from unswitching the loop, the pass would return an incorrect Modified status. This was caught using the check introduced by D80916. Reviewed By: asbirlea Differential Revision: https://reviews.llvm.org/D86085
43 lines
1.5 KiB
LLVM
43 lines
1.5 KiB
LLVM
; RUN: opt -loop-unswitch -enable-new-pm=0 %s -S | FileCheck %s
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; When hoisting simple values out from a loop, and not being able to unswitch
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; the loop due to the convergent call, the pass would return an incorrect
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; Modified status. This was caught by the pass return status check that is
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; hidden under EXPENSIVE_CHECKS.
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; CHECK-LABEL: entry:
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; CHECK-NEXT: %0 = call i32 @llvm.objectsize.i32.p0i8(i8* bitcast (%struct.anon* @b to i8*), i1 false, i1 false, i1 false)
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; CHECK-NEXT: %1 = icmp uge i32 %0, 1
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; CHECK-NEXT: br label %for.cond
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%struct.anon = type { i16 }
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@b = global %struct.anon zeroinitializer, align 1
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; Function Attrs: nounwind
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define i16 @c() #0 {
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entry:
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br label %for.cond
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for.cond: ; preds = %cont, %entry
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br label %for.inc
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for.inc: ; preds = %for.cond
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%0 = call i32 @llvm.objectsize.i32.p0i8(i8* bitcast (%struct.anon* @b to i8*), i1 false, i1 false, i1 false)
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%1 = icmp uge i32 %0, 1
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br i1 %1, label %cont, label %cont
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cont: ; preds = %for.inc
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call void @conv() convergent
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%2 = load i16, i16* getelementptr inbounds (%struct.anon, %struct.anon* @b, i32 0, i32 0), align 1
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br label %for.cond
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}
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; Function Attrs: nounwind readnone speculatable willreturn
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declare i32 @llvm.objectsize.i32.p0i8(i8*, i1 immarg, i1 immarg, i1 immarg) #1
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declare void @conv() convergent
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attributes #0 = { nounwind }
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attributes #1 = { nounwind readnone speculatable willreturn }
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