[llvm-bugs] [Bug 27631] Poor code generation from LLVM.
via llvm-bugs
llvm-bugs at lists.llvm.org
Fri Sep 8 10:06:45 PDT 2017
https://bugs.llvm.org/show_bug.cgi?id=27631
Simon Pilgrim <llvm-dev at redking.me.uk> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #1 from Simon Pilgrim <llvm-dev at redking.me.uk> ---
Fixed in trunk.
By clang 4.0.0:
xorps %xmm0, %xmm0
.LBB0_1: # =>This Inner Loop Header: Depth=1
movaps %xmm0, 48(%rax)
movaps %xmm0, 32(%rax)
movaps %xmm0, 16(%rax)
movaps %xmm0, (%rax)
movd %ecx, %xmm1
pshufd $0, %xmm1, %xmm1 # xmm1 = xmm1[0,0,0,0]
movdqa %xmm1, 16(%rax)
movdqa %xmm1, (%rax)
incq %rcx
addq $64, %rax
cmpq $10000, %rcx # imm = 0x2710
jne .LBB0_1
retq
And clang 5.0.0/trunk:
xorps %xmm0, %xmm0
.LBB0_1: # =>This Inner Loop Header: Depth=1
movaps %xmm0, 48(%rax)
movaps %xmm0, 32(%rax)
movd %ecx, %xmm1
pshufd $0, %xmm1, %xmm1 # xmm1 = xmm1[0,0,0,0]
movdqa %xmm1, 16(%rax)
movdqa %xmm1, (%rax)
incq %rcx
addq $64, %rax
cmpq $10000, %rcx # imm = 0x2710
jne .LBB0_1
retq
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