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c14a1eda84
The x86_mmx type is used for MMX intrinsics, parameters and return values where these use MMX registers, and is also supported in load, store, and bitcast. Only the above operations generate MMX instructions, and optimizations do not operate on or produce MMX intrinsics. MMX-sized vectors <2 x i32> etc. are lowered to XMM or split into smaller pieces. Optimizations may occur on these forms and the result casted back to x86_mmx, provided the result feeds into a previous existing x86_mmx operation. The point of all this is prevent optimizations from introducing MMX operations, which is unsafe due to the EMMS problem. llvm-svn: 115243
20 lines
1.5 KiB
LLVM
20 lines
1.5 KiB
LLVM
; RUN: llc < %s -march=x86 -mattr=+mmx
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define i32 @t2() nounwind {
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entry:
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tail call void asm sideeffect "# top of block", "~{dirflag},~{fpsr},~{flags},~{di},~{si},~{dx},~{cx},~{ax}"( ) nounwind
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tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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tail call void asm sideeffect ".line 8", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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%tmp1 = tail call x86_mmx asm sideeffect "movd $1, $0", "=={mm4},{bp},~{dirflag},~{fpsr},~{flags},~{memory}"( i32 undef ) nounwind ; <x86_mmx> [#uses=1]
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tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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tail call void asm sideeffect ".line 9", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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%tmp3 = tail call i32 asm sideeffect "movd $1, $0", "=={bp},{mm3},~{dirflag},~{fpsr},~{flags},~{memory}"( x86_mmx undef ) nounwind ; <i32> [#uses=1]
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tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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tail call void asm sideeffect ".line 10", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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tail call void asm sideeffect "movntq $0, 0($1,$2)", "{mm0},{di},{bp},~{dirflag},~{fpsr},~{flags},~{memory}"( x86_mmx undef, i32 undef, i32 %tmp3 ) nounwind
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tail call void asm sideeffect ".file \224443946.c\22", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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tail call void asm sideeffect ".line 11", "~{dirflag},~{fpsr},~{flags}"( ) nounwind
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%tmp8 = tail call i32 asm sideeffect "movd $1, $0", "=={bp},{mm4},~{dirflag},~{fpsr},~{flags},~{memory}"( x86_mmx %tmp1 ) nounwind ; <i32> [#uses=0]
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ret i32 undef
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}
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