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Add CMP32mr and friends to the load-unfolding table. Among 

other things, this allows the scheduler to unfold a load operand
in the 2008-01-08-SchedulerCrash.ll testcase, so it now successfully
clones the comparison to avoid a pushf+popf.

llvm-svn: 48777
This commit is contained in:
Dan Gohman 2008-03-25 16:53:19 +00:00
parent 4b55badc39
commit 883cbfd0ba
2 changed files with 5 additions and 1 deletions
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4
llvm/lib/Target/X86/X86InstrInfo.cpp
View File

@ -222,11 +222,15 @@ X86InstrInfo::X86InstrInfo(X86TargetMachine &tm)
{ X86::CALL64r, X86::CALL64m, 1 },
{ X86::CMP16ri, X86::CMP16mi, 1 },
{ X86::CMP16ri8, X86::CMP16mi8, 1 },
{ X86::CMP16rr, X86::CMP16mr, 1 },
{ X86::CMP32ri, X86::CMP32mi, 1 },
{ X86::CMP32ri8, X86::CMP32mi8, 1 },
{ X86::CMP32rr, X86::CMP32mr, 1 },
{ X86::CMP64ri32, X86::CMP64mi32, 1 },
{ X86::CMP64ri8, X86::CMP64mi8, 1 },
{ X86::CMP64rr, X86::CMP64mr, 1 },
{ X86::CMP8ri, X86::CMP8mi, 1 },
{ X86::CMP8rr, X86::CMP8mr, 1 },
{ X86::DIV16r, X86::DIV16m, 1 },
{ X86::DIV32r, X86::DIV32m, 1 },
{ X86::DIV64r, X86::DIV64m, 1 },

2
llvm/test/CodeGen/X86/2008-01-08-SchedulerCrash.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | llc -march=x86
; RUN: llvm-as < %s | llc -march=x86 | not grep pushf
%struct.indexentry = type { i32, i8*, i8*, i8*, i8*, i8* }