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[mips][microMIPS] Delay slot filler modifications

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Differential Revision: http://reviews.llvm.org/D18181

llvm-svn: 264147
This commit is contained in:
Hrvoje Varga 2016-03-23 10:29:38 +00:00
parent d2783a8964
commit 54f466bad6
2 changed files with 10 additions and 0 deletions
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6
lib/Target/Mips/MipsDelaySlotFiller.cpp
View File

@ -562,6 +562,12 @@ bool Filler::runOnMachineBasicBlock(MachineBasicBlock &MBB) {
bool InMicroMipsMode = STI.inMicroMipsMode();
const MipsInstrInfo *TII = STI.getInstrInfo();
if (InMicroMipsMode && STI.hasMips32r6()) {
// This is microMIPS32r6 or microMIPS64r6 processor. Delay slot for
// branching instructions is not needed.
return Changed;
}
for (Iter I = MBB.begin(); I != MBB.end(); ++I) {
if (!hasUnoccupiedSlot(&*I))
continue;

4
test/CodeGen/Mips/micromips-delay-slot.ll
View File

@ -1,5 +1,7 @@
; RUN: llc -march=mipsel -mcpu=mips32r2 -mattr=+micromips \
; RUN: -relocation-model=static -O2 < %s | FileCheck %s
; RUN: llc -march=mipsel -mcpu=mips32r6 -mattr=+micromips \
; RUN: -relocation-model=static -O2 < %s | FileCheck %s -check-prefix=CHECK-MMR6
; Function Attrs: nounwind
define i32 @foo(i32 signext %a) #0 {
@ -16,3 +18,5 @@ declare i32 @bar(i32 signext) #1
; CHECK: jals
; CHECK-NEXT: sll16
; CHECK-MMR6: jal
; CHECK-MMR6-NOT: sll16