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| author | Dan Gohman <gohman@apple.com> | 2011-05-23 21:07:39 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2011-05-23 21:07:39 +0000 |
| commit | 1b58d4536a561f28bf935dcb29b483c52a6bf4c6 (patch) | |
| tree | 80e36c471ebb01345cc1c381f1c526c8f9af5546 /test/CodeGen/X86 | |
| parent | 95ae09afdedcb8de3d20307c7ee924079d12c68a (diff) | |
| download | llvm-1b58d4536a561f28bf935dcb29b483c52a6bf4c6.tar.gz llvm-1b58d4536a561f28bf935dcb29b483c52a6bf4c6.tar.bz2 llvm-1b58d4536a561f28bf935dcb29b483c52a6bf4c6.tar.xz | |
When checking for signed multiplication overflow, watch out for INT_MIN and -1.
This fixes PR9845.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131919 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/CodeGen/X86')
| -rw-r--r-- | test/CodeGen/X86/lsr-overflow.ll | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/test/CodeGen/X86/lsr-overflow.ll b/test/CodeGen/X86/lsr-overflow.ll index 5bc4f7e96a..09c1c07ef3 100644 --- a/test/CodeGen/X86/lsr-overflow.ll +++ b/test/CodeGen/X86/lsr-overflow.ll @@ -25,3 +25,21 @@ __ABContainsLabel.exit: %cmp = icmp eq i64 %indvar, 9223372036854775807 ret i1 %cmp } + +define void @func_37() noreturn nounwind readonly { +entry: + br label %for.body + +for.body: ; preds = %for.inc8, %entry + %indvar = phi i64 [ 0, %entry ], [ %indvar.next, %for.inc8 ] + %sub.i = add i64 undef, %indvar + %cmp.i = icmp eq i64 %sub.i, -9223372036854775808 + br i1 undef, label %for.inc8, label %for.cond4 + +for.cond4: ; preds = %for.cond4, %for.body + br label %for.cond4 + +for.inc8: ; preds = %for.body + %indvar.next = add i64 %indvar, 1 + br label %for.body +} |