Handle 'a' modifier in ARM inline assembly.

Patch by Richard Pennington.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@68464 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index e9997adda35537cd21f8d3b135a67d9192c065b9..b3fa88eeaa5a688489a407d660591c3e70cfc8e9 100644 (file)
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -739,7 +739,10 @@ bool ARMAsmPrinter::PrintAsmOperand(const MachineInstr *MI, unsigned OpNo,
     
     switch (ExtraCode[0]) {
     default: return true;  // Unknown modifier.
+    case 'a': // Don't print "#" before a global var name or constant.
     case 'c': // Don't print "$" before a global var name or constant.
+      printOperand(MI, OpNo, "no_hash");
+      return false;
     case 'P': // Print a VFP double precision register.
       printOperand(MI, OpNo);
       return false;

diff --git a/test/CodeGen/ARM/2009-04-06-AsmModifier.ll b/test/CodeGen/ARM/2009-04-06-AsmModifier.ll
new file mode 100644 (file)
index 0000000..ee6dc84
--- /dev/null
+++ b/test/CodeGen/ARM/2009-04-06-AsmModifier.ll
@@ -0,0 +1,19 @@
+; RUN: llvm-as < %s | llc -march=arm | grep {swi 107}
+
+define i32 @_swilseek(i32) nounwind {
+entry:
+       %ptr = alloca i32               ; <i32*> [#uses=2]
+       store i32 %0, i32* %ptr
+       %retval = alloca i32            ; <i32*> [#uses=2]
+       store i32 0, i32* %retval
+       %res = alloca i32               ; <i32*> [#uses=0]
+       %fh = alloca i32                ; <i32*> [#uses=1]
+       %1 = load i32* %fh              ; <i32> [#uses=1]
+       %2 = load i32* %ptr             ; <i32> [#uses=1]
+       %3 = call i32* asm "mov r0, $2; mov r1, $3; swi ${1:a}; mov $0, r0", "=r,i,r,r,~{r0},~{r1}"(i32 107, i32 %1, i32 %2) nounwind           ; <i32*> [#uses=0]
+       br label %return
+
+return:                ; preds = %entry
+       %4 = load i32* %retval          ; <i32> [#uses=1]
+       ret i32 %4
+}