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Add -verify-arm-pseudo-expand.

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This hidden llc option runs the machine code verifier after expanding
ARM pseudo-instructions, but before if-conversion.

The machine code verifier is much better at pointing out liveness errors
that can trip up the register scavenger.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136439 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-07-29 00:27:32 +00:00
parent ef71597242
commit e69438fb87
2 changed files with 8 additions and 1 deletions
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7
lib/Target/ARM/ARMExpandPseudoInsts.cpp
View File

@ -26,9 +26,14 @@
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/raw_ostream.h" // FIXME: for debug only. remove!
using namespace llvm;
cl::opt<bool>
VerifyARMPseudo("verify-arm-pseudo-expand", cl::Hidden,
cl::desc("Verify machine code after expanding ARM pseudos"));
namespace {
class ARMExpandPseudo : public MachineFunctionPass {
public:
@ -1328,6 +1333,8 @@ bool ARMExpandPseudo::runOnMachineFunction(MachineFunction &MF) {
for (MachineFunction::iterator MFI = MF.begin(), E = MF.end(); MFI != E;
++MFI)
Modified |= ExpandMBB(*MFI);
if (VerifyARMPseudo)
MF.verify(this, "After expanding ARM pseudo instructions.");
return Modified;
}

2
test/CodeGen/ARM/crash.ll
View File

@ -1,4 +1,4 @@
; RUN: llc < %s -mtriple=thumbv7-apple-darwin10
; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 -verify-arm-pseudo-expand
; <rdar://problem/8529919>
%struct.foo = type { i32, i32 }