https://llvm.org/bugs/show_bug.cgi?id=28461
Bug ID: 28461
Summary: cvttpd2dq is not generated for <2 x double> to <2 x
i32> casts
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: mku...@google.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
For:
define <2 x i32> @foo(<2 x double> %arg) {
%ret = fptosi <2 x double> %arg to <2 x i32>
ret <2 x i32> %ret
}
We produce, with llc -matr=+sse4.2:
cvttsd2si %xmm0, %rax
movd %rax, %xmm1
shufpd $1, %xmm0, %xmm0 # xmm0 = xmm0[1,0]
cvttsd2si %xmm0, %rax
movd %rax, %xmm0
punpcklqdq %xmm0, %xmm1 # xmm1 = xmm1[0],xmm0[0]
movdqa %xmm1, %xmm0
retq
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