From fa2e88da1c8b8d98c2f0ffeba963f0eaa3a18e9c Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@codeaurora.org>
Date: Wed, 30 Apr 2014 15:29:57 +0000
Subject: [PATCH] [ARM64][fast-isel] Fast-isel doesn't know how to handle f128.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207659 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM64/ARM64FastISel.cpp        | 15 +++++++++-
 test/CodeGen/ARM64/fast-isel-noconvert.ll | 34 ++++++++++++++++++++++-
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/lib/Target/ARM64/ARM64FastISel.cpp b/lib/Target/ARM64/ARM64FastISel.cpp
index 0fce1cc64e3..c43f2af15be 100644
--- a/lib/Target/ARM64/ARM64FastISel.cpp
+++ b/lib/Target/ARM64/ARM64FastISel.cpp
@@ -197,6 +197,9 @@ unsigned ARM64FastISel::TargetMaterializeAlloca(const AllocaInst *AI) {
 }
 
 unsigned ARM64FastISel::ARM64MaterializeFP(const ConstantFP *CFP, MVT VT) {
+  if (VT != MVT::f32 && VT != MVT::f64)
+    return 0;
+
   const APFloat Val = CFP->getValueAPF();
   bool is64bit = (VT == MVT::f64);
 
@@ -418,7 +421,11 @@ bool ARM64FastISel::isTypeLegal(Type *Ty, MVT &VT) {
     return false;
   VT = evt.getSimpleVT();
 
-  // Handle all legal types, i.e. a register that will directly hold this
+  // This is a legal type, but it's not something we handle in fast-isel.
+  if (VT == MVT::f128)
+    return false;
+
+  // Handle all other legal types, i.e. a register that will directly hold this
   // value.
   return TLI.isTypeLegal(VT);
 }
@@ -1107,6 +1114,8 @@ bool ARM64FastISel::SelectFPToInt(const Instruction *I, bool Signed) {
     return false;
 
   EVT SrcVT = TLI.getValueType(I->getOperand(0)->getType(), true);
+  if (SrcVT == MVT::f128)
+    return false;
 
   unsigned Opc;
   if (SrcVT == MVT::f64) {
@@ -1132,6 +1141,8 @@ bool ARM64FastISel::SelectIntToFP(const Instruction *I, bool Signed) {
   MVT DestVT;
   if (!isTypeLegal(I->getType(), DestVT) || DestVT.isVector())
     return false;
+  assert ((DestVT == MVT::f32 || DestVT == MVT::f64) &&
+          "Unexpected value type.");
 
   unsigned SrcReg = getRegForValue(I->getOperand(0));
   if (SrcReg == 0)
@@ -1578,6 +1589,8 @@ bool ARM64FastISel::SelectRet(const Instruction *I) {
     if (!RVEVT.isSimple())
       return false;
     MVT RVVT = RVEVT.getSimpleVT();
+    if (RVVT == MVT::f128)
+      return false;
     MVT DestVT = VA.getValVT();
     // Special handling for extended integers.
     if (RVVT != DestVT) {
diff --git a/test/CodeGen/ARM64/fast-isel-noconvert.ll b/test/CodeGen/ARM64/fast-isel-noconvert.ll
index 35179700161..483d1799f9c 100644
--- a/test/CodeGen/ARM64/fast-isel-noconvert.ll
+++ b/test/CodeGen/ARM64/fast-isel-noconvert.ll
@@ -33,4 +33,36 @@ define <2 x i64> @test_fptosi(<2 x double> %in) {
 
   %res = fptosi <2 x double> %in to <2 x i64>
   ret <2 x i64> %res
-}
\ No newline at end of file
+}
+
+define fp128 @uitofp_i32_fp128(i32 %a) {
+entry:
+; CHECK-LABEL: uitofp_i32_fp128
+; CHECK: bl ___floatunsitf
+  %conv = uitofp i32 %a to fp128
+  ret fp128 %conv
+}
+
+define fp128 @uitofp_i64_fp128(i64 %a) {
+entry:
+; CHECK-LABEL: uitofp_i64_fp128
+; CHECK: bl ___floatunditf
+  %conv = uitofp i64 %a to fp128
+  ret fp128 %conv
+}
+
+define i32 @uitofp_fp128_i32(fp128 %a) {
+entry:
+; CHECK-LABEL: uitofp_fp128_i32
+; CHECK: ___fixunstfsi
+  %conv = fptoui fp128 %a to i32
+  ret i32 %conv
+}
+
+define i64 @uitofp_fp128_i64(fp128 %a) {
+entry:
+; CHECK-LABEL: uitofp_fp128_i64
+; CHECK: ___fixunstfdi
+  %conv = fptoui fp128 %a to i64
+  ret i64 %conv
+}