13aa2c1c3b
In dependent-capture, previously we'd see that %tmp4 is captured due to the first store. We'd cache this info in CapturedBeforeReturn and InvisibleToCallerAfterRet. Then the first store is then removed, causing the cached values to be wrong. We also need to revisit everything because normally we work backwards when removing stores at the end of the function, but in this case removing an earlier store causes a later store to be removable. No compile time impact: https://llvm-compile-time-tracker.com/compare.php?from=56796ae1a8db4c85dada28676f8303a5a3609c63&to=21b7e5248ffc423cd36c9d4a020085e363451465&stat=instructions Reviewed By: asbirlea Differential Revision: https://reviews.llvm.org/D123686
18 lines
472 B
LLVM
18 lines
472 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=dse -S < %s | FileCheck %s
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define void @f() {
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; CHECK-LABEL: @f(
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; CHECK-NEXT: [[TMP1:%.*]] = call noalias ptr @_Znwm()
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; CHECK-NEXT: [[TMP4:%.*]] = call noalias ptr @_Znwm()
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; CHECK-NEXT: ret void
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;
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%tmp1 = call noalias ptr @_Znwm()
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%tmp4 = call noalias ptr @_Znwm()
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store ptr %tmp4, ptr %tmp1
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store i8 0, ptr %tmp4, align 1
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ret void
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}
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declare ptr @_Znwm()
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