Add support for the ARM 't' register constraint. And another testcase

for the 'x' register constraint.

Part of rdar://9119939

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@134220 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 1141f42f14dcdfc55b625b9de294d379695a10aa..4a78ad4bf2dbbda67e3cf16196926bc073d8b822 100644 (file)
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -7484,6 +7484,7 @@ ARMTargetLowering::getConstraintType(const std::string &Constraint) const {
     case 'w': return C_RegisterClass;
     case 'h': return C_RegisterClass;
     case 'x': return C_RegisterClass;
+    case 't': return C_RegisterClass;
     }
   } else if (Constraint.size() == 2) {
     switch (Constraint[0]) {
@@ -7563,6 +7564,10 @@ ARMTargetLowering::getRegForInlineAsmConstraint(const std::string &Constraint,
       if (VT.getSizeInBits() == 128)
        return RCPair(0U, ARM::QPR_8RegisterClass);
       break;
+    case 't':
+      if (VT == MVT::f32)
+       return RCPair(0U, ARM::SPRRegisterClass);
+      break;
     }
   }
   if (StringRef("{cc}").equals_lower(Constraint))

diff --git a/test/CodeGen/ARM/inlineasm3.ll b/test/CodeGen/ARM/inlineasm3.ll
index f09deb39f8c8a2d0bae9bd5f790d37461151e904..00257e1cdb3e38e20ef0268116769c2df737baab 100644 (file)
--- a/test/CodeGen/ARM/inlineasm3.ll
+++ b/test/CodeGen/ARM/inlineasm3.ll
@@ -68,3 +68,23 @@ entry:
   %0 = tail call float asm "flds s15, $0", "=x"() nounwind
   ret float %0
 }
+
+; Radar 9307836 & 9119939
+
+define double @t7(double %y) nounwind ssp {
+entry:
+; CHECK: t7
+; CHECK: flds s15, d0
+  %0 = tail call double asm "flds s15, $0", "=x"() nounwind
+  ret double %0
+}
+
+; Radar 9307836 & 9119939
+
+define float @t8(float %y) nounwind ssp {
+entry:
+; CHECK: t8
+; CHECK: flds s15, s0
+  %0 = tail call float asm "flds s15, $0", "=t"() nounwind
+  ret float %0
+}