[X86] Part 2 to fix x86-64 fp128 calling convention.

Part 1 was submitted in http://reviews.llvm.org/D15134.
Changes in this part:
* X86RegisterInfo.td, X86RecognizableInstr.cpp: Add FR128 register class.
* X86CallingConv.td: Pass f128 values in XMM registers or on stack.
* X86InstrCompiler.td, X86InstrInfo.td, X86InstrSSE.td:
  Add instruction selection patterns for f128.
* X86ISelLowering.cpp:
  When target has MMX registers, configure MVT::f128 in FR128RegClass,
  with TypeSoftenFloat action, and custom actions for some opcodes.
  Add missed cases of MVT::f128 in places that handle f32, f64, or vector types.
  Add TODO comment to support f128 type in inline assembly code.
* SelectionDAGBuilder.cpp:
  Fix infinite loop when f128 type can have
  VT == TLI.getTypeToTransformTo(Ctx, VT).
* Add unit tests for x86-64 fp128 type.

Differential Revision: http://reviews.llvm.org/D11438

llvm-svn: 255558

1 files changed, 47 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/X86/fp128-calling-conv.ll b/llvm/test/CodeGen/X86/fp128-calling-conv.ll
new file mode 100644
index 00000000000..e1dab30847c
--- /dev/null
+++ b/llvm/test/CodeGen/X86/fp128-calling-conv.ll
@@ -0,0 +1,47 @@
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-android -mattr=+mmx | FileCheck %s
+; RUN: llc < %s -O2 -mtriple=x86_64-linux-gnu -mattr=+mmx | FileCheck %s
+
+; __float128 myFP128 = 1.0L;  // x86_64-linux-android
+@myFP128 = global fp128 0xL00000000000000003FFF000000000000, align 16
+
+; The first few parameters are passed in registers and the other are on stack.
+
+define fp128 @TestParam_FP128_0(fp128 %d0, fp128 %d1, fp128 %d2, fp128 %d3, fp128 %d4, fp128 %d5, fp128 %d6, fp128 %d7, fp128 %d8, fp128 %d9, fp128 %d10, fp128 %d11, fp128 %d12, fp128 %d13, fp128 %d14, fp128 %d15, fp128 %d16, fp128 %d17, fp128 %d18, fp128 %d19) {
+entry:
+  ret fp128 %d0
+; CHECK-LABEL: TestParam_FP128_0:
+; CHECK-NOT:   mov
+; CHECK:       retq
+}
+
+define fp128 @TestParam_FP128_1(fp128 %d0, fp128 %d1, fp128 %d2, fp128 %d3, fp128 %d4, fp128 %d5, fp128 %d6, fp128 %d7, fp128 %d8, fp128 %d9, fp128 %d10, fp128 %d11, fp128 %d12, fp128 %d13, fp128 %d14, fp128 %d15, fp128 %d16, fp128 %d17, fp128 %d18, fp128 %d19) {
+entry:
+  ret fp128 %d1
+; CHECK-LABEL: TestParam_FP128_1:
+; CHECK:       movaps  %xmm1, %xmm0
+; CHECK-NEXT:  retq
+}
+
+define fp128 @TestParam_FP128_7(fp128 %d0, fp128 %d1, fp128 %d2, fp128 %d3, fp128 %d4, fp128 %d5, fp128 %d6, fp128 %d7, fp128 %d8, fp128 %d9, fp128 %d10, fp128 %d11, fp128 %d12, fp128 %d13, fp128 %d14, fp128 %d15, fp128 %d16, fp128 %d17, fp128 %d18, fp128 %d19) {
+entry:
+  ret fp128 %d7
+; CHECK-LABEL: TestParam_FP128_7:
+; CHECK:       movaps  %xmm7, %xmm0
+; CHECK-NEXT:  retq
+}
+
+define fp128 @TestParam_FP128_8(fp128 %d0, fp128 %d1, fp128 %d2, fp128 %d3, fp128 %d4, fp128 %d5, fp128 %d6, fp128 %d7, fp128 %d8, fp128 %d9, fp128 %d10, fp128 %d11, fp128 %d12, fp128 %d13, fp128 %d14, fp128 %d15, fp128 %d16, fp128 %d17, fp128 %d18, fp128 %d19) {
+entry:
+  ret fp128 %d8
+; CHECK-LABEL: TestParam_FP128_8:
+; CHECK:       movaps 8(%rsp), %xmm0
+; CHECK-NEXT:  retq
+}
+
+define fp128 @TestParam_FP128_9(fp128 %d0, fp128 %d1, fp128 %d2, fp128 %d3, fp128 %d4, fp128 %d5, fp128 %d6, fp128 %d7, fp128 %d8, fp128 %d9, fp128 %d10, fp128 %d11, fp128 %d12, fp128 %d13, fp128 %d14, fp128 %d15, fp128 %d16, fp128 %d17, fp128 %d18, fp128 %d19) {
+entry:
+  ret fp128 %d9
+; CHECK-LABEL: TestParam_FP128_9:
+; CHECK:       movaps 24(%rsp), %xmm0
+; CHECK-NEXT:  retq
+}