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Extension of r107506. Make sure that we don't mark a function as having a call

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if the inline ASM doesn't need a stack frame.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107922 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2010-07-08 22:38:02 +00:00
parent 7cc4f9cd28
commit c930cbcada
2 changed files with 32 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
View File

@ -300,7 +300,8 @@ bool SelectionDAGISel::runOnMachineFunction(MachineFunction &mf) {
for (MachineBasicBlock::const_iterator
II = MBB->begin(), IE = MBB->end(); II != IE; ++II) {
const TargetInstrDesc &TID = TM.getInstrInfo()->get(II->getOpcode());
if (II->isInlineAsm() || (TID.isCall() && !TID.isReturn())) {
if ((II->isInlineAsm() && II->getOperand(1).getImm()) ||
(TID.isCall() && !TID.isReturn())) {
MFI->setHasCalls(true);
goto done;
}

30
test/CodeGen/X86/leaf-fp-elim.ll Normal file
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@ -0,0 +1,30 @@
; RUN: llc < %s -disable-non-leaf-fp-elim -relocation-model=pic -mtriple=x86_64-apple-darwin | FileCheck %s
; <rdar://problem/8170192>
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
target triple = "x86_64-apple-darwin11.0"
@msg = internal global i8* null ; <i8**> [#uses=1]
@.str = private constant [2 x i8] c"x\00", align 1 ; <[2 x i8]*> [#uses=1]
define void @test(i8* %p) nounwind optsize ssp {
; No stack frame, please.
; CHECK: _test
; CHECK-NOT: pushq %rbp
; CHECK-NOT: movq %rsp, %rbp
; CHECK: InlineAsm Start
entry:
%0 = icmp eq i8* %p, null ; <i1> [#uses=1]
br i1 %0, label %return, label %bb
bb: ; preds = %entry
tail call void asm "mov $1, $0", "=*m,{cx},~{dirflag},~{fpsr},~{flags}"(i8** @msg, i8* getelementptr inbounds ([2 x i8]* @.str, i64 0, i64 0)) nounwind
tail call void @llvm.trap()
unreachable
return: ; preds = %entry
ret void
}
declare void @llvm.trap() nounwind