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SCCP miscompiles sitofp(undef) #7312

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sunfishcode opened this issue Apr 26, 2010 · 1 comment
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SCCP miscompiles sitofp(undef) #7312

sunfishcode opened this issue Apr 26, 2010 · 1 comment
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@sunfishcode
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Bugzilla Link 6940
Resolution FIXED
Resolved on Apr 26, 2010 13:21
Version trunk
OS All

Extended Description

On this testcase:

define double @​foo() {
%t = sitofp i32 undef to double
ret double %t
}

SCCP changes the sitofp operand to undef. This is over-aggressive, since there exist double values which sitofp cannot produce. For comparison, instcombine on this testcase changes the operand to 0.0.
@lattner
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lattner commented Apr 26, 2010

Fixed in r102358, thanks.

@llvmbot llvmbot transferred this issue from llvm/llvm-bugzilla-archive Dec 3, 2021
cyndyishida pushed a commit to cyndyishida/llvm-project that referenced this issue Sep 5, 2023
@egorzhdan
Merge pull request llvm#7312 from apple/egorzhdan/apinotes-extern-cxx…
1cbf3d5 
…-20230725

🍒[APINotes] Support globals in `extern "C++"` blocks
@banach-space banach-space mentioned this issue Dec 13, 2023
Merged
banach-space added a commit to banach-space/llvm-project that referenced this issue Dec 14, 2023
@banach-space
[flang][driver] Don't use -whole-archive on Darwin
95b4db0 
Direct follow-up of llvm#7312 - the linker on Darwin does not support
`-whole-archive`, so that needs to be removed from the linker
invocation.

For context:
  * llvm#7312
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@sunfishcode @lattner