diff options
| -rw-r--r-- | lib/Target/X86/X86AsmPrinter.cpp | 8 | ||||
| -rw-r--r-- | test/CodeGen/X86/inline-asm-modifier-q.ll | 12 |
2 files changed, 17 insertions, 3 deletions
diff --git a/lib/Target/X86/X86AsmPrinter.cpp b/lib/Target/X86/X86AsmPrinter.cpp index 1258441150..1f5f91844f 100644 --- a/lib/Target/X86/X86AsmPrinter.cpp +++ b/lib/Target/X86/X86AsmPrinter.cpp @@ -393,9 +393,11 @@ bool X86AsmPrinter::printAsmMRegister(const MachineOperand &MO, char Mode, case 'k': // Print SImode register Reg = getX86SubSuperRegister(Reg, MVT::i32); break; - case 'q': // Print DImode register - // FIXME: gcc will actually print e instead of r for 32-bit. - Reg = getX86SubSuperRegister(Reg, MVT::i64); + case 'q': + // Print 64-bit register names if 64-bit integer registers are available. + // Otherwise, print 32-bit register names. + MVT::SimpleValueType Ty = Subtarget->is64Bit() ? MVT::i64 : MVT::i32; + Reg = getX86SubSuperRegister(Reg, Ty); break; } diff --git a/test/CodeGen/X86/inline-asm-modifier-q.ll b/test/CodeGen/X86/inline-asm-modifier-q.ll new file mode 100644 index 0000000000..d20f06d290 --- /dev/null +++ b/test/CodeGen/X86/inline-asm-modifier-q.ll @@ -0,0 +1,12 @@ +; RUN: llc < %s -march=x86 | FileCheck %s + +; If the target does not have 64-bit integer registers, emit 32-bit register +; names. + +; CHECK: movq (%e{{[abcd]}}x, %ebx, 4) + +define void @q_modifier(i32* %p) { +entry: + tail call void asm sideeffect "movq (${0:q}, %ebx, 4), %mm0", "r,~{dirflag},~{fpsr},~{flags}"(i32* %p) + ret void +} |