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Prevent IMPLICIT_DEF/KILL to become a delay filler instruction in SPARC backend.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125444 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Venkatraman Govindaraju 2011-02-12 19:02:33 +00:00
parent d02be24cad
commit cc5bd4a561
2 changed files with 16 additions and 0 deletions
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3
lib/Target/Sparc/DelaySlotFiller.cpp
View File

@ -182,6 +182,9 @@ bool Filler::delayHasHazard(MachineBasicBlock::iterator candidate,
SmallSet<unsigned, 32> &RegUses)
{
if (candidate->isImplicitDef() || candidate->isKill())
return true;
if (candidate->getDesc().mayLoad()) {
sawLoad = true;
if (sawStore)

13
test/CodeGen/SPARC/2011-01-19-DelaySlot.ll
View File

@ -1,4 +1,5 @@
;RUN: llc -march=sparc < %s | FileCheck %s
;RUN: llc -march=sparc -O0 < %s | FileCheck %s -check-prefix=UNOPT
define i32 @test(i32 %a) nounwind {
@ -75,3 +76,15 @@ bb1: ; preds = %entry
declare i32 @foo(...)
declare i32 @bar(i32)
define i32 @test_implicit_def() nounwind {
entry:
;UNOPT: test_implicit_def
;UNOPT: call func
;UNOPT-NEXT: nop
%0 = tail call i32 @func(i32* undef) nounwind
ret i32 0
}
declare i32 @func(i32*)