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llvm-mirror/test/CodeGen/X86/2008-06-25-VecISelBug.ll
Evan Cheng 71fbfe73c1 - Fix a x86 vector isel bug: illegal transformation of a vector_shuffle into a
shift.
- Add a readme entry for a missing vector_shuffle optimization that results in
  awful codegen.

llvm-svn: 52740
2008-06-25 20:52:59 +00:00

10 lines
431 B
LLVM

; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | not grep pslldq
define void @t() nounwind {
entry:
%tmp1 = shufflevector <4 x float> zeroinitializer, <4 x float> < float 0.000000e+00, float 1.000000e+00, float 0.000000e+00, float 1.000000e+00 >, <4 x i32> < i32 0, i32 1, i32 4, i32 5 >
%tmp2 = insertelement <4 x float> %tmp1, float 1.000000e+00, i32 3
store <4 x float> %tmp2, <4 x float>* null, align 16
unreachable
}