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Handle 'a' modifier in X86 asms. PR 4742.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79484 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dale Johannesen 2009-08-19 22:44:41 +00:00
parent 781c2b8c49
commit 7bcec7e541
2 changed files with 30 additions and 0 deletions
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12
lib/Target/X86/AsmPrinter/X86ATTAsmPrinter.cpp
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@ -620,6 +620,18 @@ bool X86ATTAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
switch (ExtraCode[0]) {
default: return true; // Unknown modifier.
case 'a': // This is an address. Currently only 'i' and 'r' are expected.
if (MO.isImm()) {
O << MO.getImm();
return false;
} else if (MO.isReg()) {
O << '(';
printOperand(MI, OpNo);
O << ')';
return false;
}
return true;
case 'c': // Don't print "$" before a global var name or constant.
if (MO.isImm())
O << MO.getImm();

18
test/CodeGen/X86/2009-08-19-inline-asm-a-modifier.ll Normal file
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@ -0,0 +1,18 @@
; RUN: llvm-as < %s | llc | grep {%gs:6}
; RUN: llvm-as < %s | llc | grep {%gs:\\\(%*\\\)}
; ModuleID = 'asm.c'
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"
target triple = "i386-apple-darwin9.6"
define i32 @main() nounwind {
entry:
%asmtmp.i = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 6) nounwind ; <i16> [#uses=1]
%0 = zext i16 %asmtmp.i to i32 ; <i32> [#uses=1]
ret i32 %0
}
define zeroext i16 @readgsword2(i32 %address) nounwind {
entry:
%asmtmp = tail call i16 asm "movw\09%gs:${1:a}, ${0:w}", "=r,ir,~{dirflag},~{fpsr},~{flags}"(i32 %address) nounwind ; <i16> [#uses=1]
ret i16 %asmtmp
}