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| author | Craig Topper <craig.topper@gmail.com> | 2013-01-03 06:40:20 +0000 |
|---|---|---|
| committer | Craig Topper <craig.topper@gmail.com> | 2013-01-03 06:40:20 +0000 |
| commit | 7c27cc9fd03803f5766079e0089b03a733b72b70 (patch) | |
| tree | 131f537ddc171ad557d612e08dcf3587ac78d02b /llvm/lib/Target | |
| parent | c8c12bc0ff9c9563a2b101b639948ca3629d949f (diff) | |
| download | bcm5719-llvm-7c27cc9fd03803f5766079e0089b03a733b72b70.tar.gz bcm5719-llvm-7c27cc9fd03803f5766079e0089b03a733b72b70.zip | |
Mark DIV/IDIV instructions hasSideEffects=1 because they can trap when dividing by 0. This is needed to keep early if conversion from moving them across basic blocks.
llvm-svn: 171461
Diffstat (limited to 'llvm/lib/Target')
| -rw-r--r-- | llvm/lib/Target/X86/X86InstrArithmetic.td | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/llvm/lib/Target/X86/X86InstrArithmetic.td b/llvm/lib/Target/X86/X86InstrArithmetic.td index d56763ea9d2..3540fc31257 100644 --- a/llvm/lib/Target/X86/X86InstrArithmetic.td +++ b/llvm/lib/Target/X86/X86InstrArithmetic.td @@ -266,7 +266,7 @@ def IMUL64rmi8 : RIi8<0x6B, MRMSrcMem, // GR64 = [mem64]*I8 // unsigned division/remainder -let hasSideEffects = 0 in { +let hasSideEffects = 1 in { // so that we don't speculatively execute let Defs = [AL,EFLAGS,AX], Uses = [AX] in def DIV8r : I<0xF6, MRM6r, (outs), (ins GR8:$src), // AX/r8 = AL,AH "div{b}\t$src", [], IIC_DIV8_REG>; |
