From: Roman Divacky <rdivacky@freebsd.org>
Date: Tue, 30 Aug 2011 17:04:16 +0000 (+0000)
Subject: Set CR1EQ only when lowering vararg floating arguments (not any vararg
X-Git-Tag: android-x86-6.0-r1~928^2~1786
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=0aaa9195b53e693eb8618fef305e3799b5b77771;p=android-x86%2Fexternal-llvm.git

Set CR1EQ only when lowering vararg floating arguments (not any vararg
arguments as before), unset CR1EQ otherwise.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@138802 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index f3917c4575b..be94b08e75a 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -2946,6 +2946,7 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
   SmallVector<TailCallArgumentInfo, 8> TailCallArguments;
   SmallVector<SDValue, 8> MemOpChains;
 
+  bool seenFloatArg = false;
   // Walk the register/memloc assignments, inserting copies/loads.
   for (unsigned i = 0, j = 0, e = ArgLocs.size();
        i != e;
@@ -2990,6 +2991,7 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
     }
 
     if (VA.isRegLoc()) {
+      seenFloatArg |= VA.getLocVT().isFloatingPoint();
       // Put argument in a physical register.
       RegsToPass.push_back(std::make_pair(VA.getLocReg(), Arg));
     } else {
@@ -3016,9 +3018,11 @@ PPCTargetLowering::LowerCall_SVR4(SDValue Chain, SDValue Callee,
     Chain = DAG.getNode(ISD::TokenFactor, dl, MVT::Other,
                         &MemOpChains[0], MemOpChains.size());
 
-  // Set CR6 to true if this is a vararg call.
+  // Set CR6 to true if this is a vararg call with floating args passed in
+  // registers.
   if (isVarArg) {
-    SDValue SetCR(DAG.getMachineNode(PPC::CRSET, dl, MVT::i32), 0);
+    SDValue SetCR(DAG.getMachineNode(seenFloatArg ? PPC::CRSET : PPC::CRUNSET,
+                                     dl, MVT::i32), 0);
     RegsToPass.push_back(std::make_pair(unsigned(PPC::CR1EQ), SetCR));
   }
 
diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 2b837b06414..f248b5ba8c4 100644
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -1053,6 +1053,10 @@ def CRSET  : XLForm_1_ext<19, 289, (outs CRBITRC:$dst), (ins),
               "creqv $dst, $dst, $dst", BrCR,
               []>;
 
+def CRUNSET: XLForm_1_ext<19, 193, (outs CRBITRC:$dst), (ins),
+              "crxor $dst, $dst, $dst", BrCR,
+              []>;
+
 // XFX-Form instructions.  Instructions that deal with SPRs.
 //
 let Uses = [CTR] in {
diff --git a/test/CodeGen/PowerPC/cr1eq.ll b/test/CodeGen/PowerPC/cr1eq.ll
new file mode 100644
index 00000000000..fb9c9695d17
--- /dev/null
+++ b/test/CodeGen/PowerPC/cr1eq.ll
@@ -0,0 +1,18 @@
+; RUN: llc < %s | FileCheck %s
+; ModuleID = 'test.c'
+target datalayout = "E-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32"
+target triple = "powerpc-unknown-freebsd"
+
+@.str = private unnamed_addr constant [4 x i8] c"%i\0A\00", align 1
+@.str1 = private unnamed_addr constant [4 x i8] c"%f\0A\00", align 1
+
+define void @foo() nounwind {
+entry:
+; CHECK: crxor 6, 6, 6
+  %call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i32 0, i32 0), i32 1)
+; CHECK: creqv 6, 6, 6
+  %call1 = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str1, i32 0, i32 0), double 1.100000e+00)
+  ret void
+}
+
+declare i32 @printf(i8*, ...)