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Make tTAILJMPr/tTAILJMPrND emit a tBX without a preceding MOV of PC to LR. This 

fixes <rdar://problem/9495913>

llvm-svn: 132042
This commit is contained in:
Cameron Zwarich 2011-05-25 04:45:27 +00:00
parent 310b3472ec
commit 3088e0a179
2 changed files with 5 additions and 1 deletions
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2
llvm/lib/Target/ARM/ARMAsmPrinter.cpp
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@ -1875,7 +1875,7 @@ void ARMAsmPrinter::EmitInstruction(const MachineInstr *MI) {
case ARM::TAILJMPr:
case ARM::tTAILJMPr: {
unsigned newOpc = (Opc == ARM::TAILJMPr || Opc == ARM::TAILJMPrND)
? ARM::BX : ARM::tBX_CALL;
? ARM::BX : ARM::tBX;
MCInst TmpInst;
TmpInst.setOpcode(newOpc);
TmpInst.addOperand(MCOperand::CreateReg(MI->getOperand(0).getReg()));

4
llvm/test/CodeGen/ARM/call-tc.ll
View File

@ -16,6 +16,10 @@ define void @t1() {
define void @t2() {
; CHECKV6: t2:
; CHECKV6: bx r0 @ TAILCALL
; CHECKT2D: t2:
; CHECKT2D: ldr
; CHECKT2D-NEXT: ldr
; CHECKT2D-NEXT: bx r0 @ TAILCALL
%tmp = load i32 ()** @t ; <i32 ()*> [#uses=1]
%tmp.upgrd.2 = tail call i32 %tmp( ) ; <i32> [#uses=0]
ret void