http://llvm.org/bugs/show_bug.cgi?id=14865
Bug #: 14865
Summary: AVX Inefficient sext conversion <8 x i8> to <8 x i64>
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
When compiling this LL code for corei7-avx we get a really long sequence of
instructions.
%T0_17 = type <8 x i8>
%T1_17 = type <8 x i64>
define void @func17() {
%v0 = load %T0_17* undef
%r = sext %T0_17 %v0 to %T1_17
store %T1_17 %r, %T1_17* undef
ret void
}
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