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Handle 'a' modifier in X86 asms. PR 4742.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79484 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -620,6 +620,18 @@ bool X86ATTAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
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switch (ExtraCode[0]) {
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switch (ExtraCode[0]) {
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default: return true; // Unknown modifier.
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default: return true; // Unknown modifier.
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case 'a': // This is an address. Currently only 'i' and 'r' are expected.
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if (MO.isImm()) {
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O << MO.getImm();
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return false;
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} else if (MO.isReg()) {
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O << '(';
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printOperand(MI, OpNo);
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O << ')';
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return false;
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}
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return true;
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case 'c': // Don't print "$" before a global var name or constant.
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case 'c': // Don't print "$" before a global var name or constant.
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if (MO.isImm())
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if (MO.isImm())
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O << MO.getImm();
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O << MO.getImm();
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18
test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll
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18
test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll
Normal file
@ -0,0 +1,18 @@
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; RUN: llvm-as < %s | llc | grep {%gs:6}
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; RUN: llvm-as < %s | llc | grep {%gs:\\\(%*\\\)}
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; ModuleID = 'asm.c'
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin9.6"
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define i32 @main() nounwind {
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entry:
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%asmtmp.i = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 6) nounwind ; <i16> [#uses=1]
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%0 = zext i16 %asmtmp.i to i32 ; <i32> [#uses=1]
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ret i32 %0
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}
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define zeroext i16 @readgsword2(i32 %address) nounwind {
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entry:
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%asmtmp = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 %address) nounwind ; <i16> [#uses=1]
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ret i16 %asmtmp
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}
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