Loosen up an assertion to allow intrinsics. I really have no

idea what this code (findNonImmUse) does, so I'm only guessing
that this is the right thing.  It would be really really nice
if this had comments and perhaps switched to SmallPtrSet
(hint hint) :)

This fixes rdar://5886601, a crash on gcc.target/i386/sse4_1-pblendw.c

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@50252 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/X86ISelDAGToDAG.cpp b/lib/Target/X86/X86ISelDAGToDAG.cpp
index 252a018a50ded94db75b5488b82b211dc7f80783..9bf9d122637c0d82178fbb5a7d4732f2937bee50 100644 (file)
--- a/lib/Target/X86/X86ISelDAGToDAG.cpp
+++ b/lib/Target/X86/X86ISelDAGToDAG.cpp
@@ -252,7 +252,10 @@ static void findNonImmUse(SDNode *Use, SDNode* Def, SDNode *ImmedUse,
         continue; // Immediate use is ok.
       if (Use == Root) {
         assert(Use->getOpcode() == ISD::STORE ||
-               Use->getOpcode() == X86ISD::CMP);
+               Use->getOpcode() == X86ISD::CMP ||
+               Use->getOpcode() == ISD::INTRINSIC_WO_CHAIN ||
+               Use->getOpcode() == ISD::INTRINSIC_W_CHAIN ||
+               Use->getOpcode() == ISD::INTRINSIC_VOID);
         continue;
       }
       found = true;

diff --git a/test/CodeGen/X86/2008-04-24-pblendw-fold-crash.ll b/test/CodeGen/X86/2008-04-24-pblendw-fold-crash.ll
new file mode 100644 (file)
index 0000000..838c2ea
--- /dev/null
+++ b/test/CodeGen/X86/2008-04-24-pblendw-fold-crash.ll
@@ -0,0 +1,15 @@
+; RUN: llvm-as < %s | llc -mattr=+sse41
+; rdar://5886601
+; gcc testsuite:  gcc.target/i386/sse4_1-pblendw.c
+target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
+target triple = "i386-apple-darwin8"
+
+define i32 @main() nounwind  {
+entry:
+       %tmp122 = load <2 x i64>* null, align 16                ; <<2 x i64>> [#uses=1]
+       %tmp126 = bitcast <2 x i64> %tmp122 to <8 x i16>                ; <<8 x i16>> [#uses=1]
+       %tmp129 = call <8 x i16> @llvm.x86.sse41.pblendw( <8 x i16> zeroinitializer, <8 x i16> %tmp126, i32 2 ) nounwind                ; <<8 x i16>> [#uses=0]
+       ret i32 0
+}
+
+declare <8 x i16> @llvm.x86.sse41.pblendw(<8 x i16>, <8 x i16>, i32) nounwind