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95a2f42a75
In particular: movsbw %al, %ax --> cbtw movswl %ax, %eax --> cwtl movslq %eax, %rax --> cltq According to Intel's manual those have the same performance characteristics but come with a smaller encoding. llvm-svn: 186174
13 lines
325 B
LLVM
13 lines
325 B
LLVM
; RUN: llc < %s -march=x86 -mattr=+sse42 | FileCheck %s
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; CHECK: cwtl
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; CHECK: cwtl
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; sign extension v2i32 to v2i16
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define void @convert(<2 x i32>* %dst.addr, <2 x i16> %src) nounwind {
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entry:
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%signext = sext <2 x i16> %src to <2 x i32> ; <<12 x i8>> [#uses=1]
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store <2 x i32> %signext, <2 x i32>* %dst.addr
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ret void
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}
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