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| author | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-10-28 03:20:10 +0000 |
|---|---|---|
| committer | Sanjoy Das <sanjoy@playingwithpointers.com> | 2015-10-28 03:20:10 +0000 |
| commit | 4ff3cf6d927049db47edbd5bc981ab19f5e17f5e (patch) | |
| tree | f37b7c71453d9ab451df3dd0f5d31d2b30352b8e /llvm/test/CodeGen | |
| parent | 0298a1d0a247ae505bc97ca9ec9c84b5f89c04fc (diff) | |
| download | bcm5719-llvm-4ff3cf6d927049db47edbd5bc981ab19f5e17f5e.tar.gz bcm5719-llvm-4ff3cf6d927049db47edbd5bc981ab19f5e17f5e.zip | |
[SelectionDAG] Don't inspect !range metadata for extended loads
Summary:
Don't call `computeKnownBitsFromRangeMetadata` for extended loads --
this can cause a mismatch between the width of the !range metadata and
the width of the APInt's accumulating `KnownZero` (and `KnownOne` in the
future). This isn't a problem now, but will be after a future change.
Note: this can be made more aggressive in the future.
Reviewers: nlewycky
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D14107
llvm-svn: 251486
Diffstat (limited to 'llvm/test/CodeGen')
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/selectiondag-extload-computeknownbits.ll | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/selectiondag-extload-computeknownbits.ll b/llvm/test/CodeGen/PowerPC/selectiondag-extload-computeknownbits.ll new file mode 100644 index 00000000000..79dccaa98ca --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/selectiondag-extload-computeknownbits.ll @@ -0,0 +1,12 @@ +; RUN: llc -mtriple=powerpc64-bgq-linux < %s + +; Check that llc does not crash due to an illegal APInt operation + +define i1 @f(i8* %ptr) { + entry: + %val = load i8, i8* %ptr, align 8, !range !0 + %tobool = icmp eq i8 %val, 0 + ret i1 %tobool +} + +!0 = !{i8 0, i8 2} |
