mirror of
https://github.com/c64scene-ar/llvm-6502.git
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67f453aae7
into a vector of zeros or undef, and when the top part is obviously zero, we can just use movd + shuffle. This allows us to compile vec_set-B.ll into: _test3: movl $1234567, %eax andl 4(%esp), %eax movd %eax, %xmm0 ret instead of: _test3: subl $28, %esp movl $1234567, %eax andl 32(%esp), %eax movl %eax, (%esp) movl $0, 4(%esp) movq (%esp), %xmm0 addl $28, %esp ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48090 91177308-0d34-0410-b5e6-96231b3b80d8
25 lines
559 B
LLVM
25 lines
559 B
LLVM
; RUN: llvm-as < %s | llc -march=x86 | not grep movaps
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; RUN: llvm-as < %s | llc -march=x86 | grep esp | count 2
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; These should both generate something like this:
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;_test3:
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; movl $1234567, %eax
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; andl 4(%esp), %eax
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; movd %eax, %xmm0
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; ret
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define <2 x i64> @test3(i64 %arg) {
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entry:
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%A = and i64 %arg, 1234567
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%B = insertelement <2 x i64> zeroinitializer, i64 %A, i32 0
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ret <2 x i64> %B
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}
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define <2 x i64> @test2(i64 %arg) {
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entry:
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%A = and i64 %arg, 1234567
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%B = insertelement <2 x i64> undef, i64 %A, i32 0
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ret <2 x i64> %B
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}
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