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https://github.com/c64scene-ar/llvm-6502.git
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ab4ad4f98e
Fix the poor codegen seen in PR21710 ( http://llvm.org/bugs/show_bug.cgi?id=21710 ). Before we crack 32-byte build vectors into smaller chunks (and then subsequently glue them back together), we should look for the easy case where we can just load all elements in a single op. An example of the codegen change is: From: vmovss 16(%rdi), %xmm1 vmovups (%rdi), %xmm0 vinsertps $16, 20(%rdi), %xmm1, %xmm1 vinsertps $32, 24(%rdi), %xmm1, %xmm1 vinsertps $48, 28(%rdi), %xmm1, %xmm1 vinsertf128 $1, %xmm1, %ymm0, %ymm0 retq To: vmovups (%rdi), %ymm0 retq Differential Revision: http://reviews.llvm.org/D6536 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223518 91177308-0d34-0410-b5e6-96231b3b80d8
100 lines
3.5 KiB
LLVM
100 lines
3.5 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx,-slow-unaligned-mem-32 | FileCheck %s --check-prefix=ALL --check-prefix=FAST32
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; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+avx,+slow-unaligned-mem-32 | FileCheck %s --check-prefix=ALL --check-prefix=SLOW32
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define <4 x float> @merge_2_floats(float* nocapture %p) nounwind readonly {
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%tmp1 = load float* %p
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%vecins = insertelement <4 x float> undef, float %tmp1, i32 0
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%add.ptr = getelementptr float* %p, i32 1
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%tmp5 = load float* %add.ptr
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%vecins7 = insertelement <4 x float> %vecins, float %tmp5, i32 1
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ret <4 x float> %vecins7
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; ALL-LABEL: merge_2_floats
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; ALL: vmovq
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; ALL-NEXT: retq
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}
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define <4 x float> @merge_4_floats(float* %ptr) {
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%a = load float* %ptr, align 8
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%vec = insertelement <4 x float> undef, float %a, i32 0
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%idx1 = getelementptr inbounds float* %ptr, i64 1
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%b = load float* %idx1, align 8
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%vec2 = insertelement <4 x float> %vec, float %b, i32 1
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%idx3 = getelementptr inbounds float* %ptr, i64 2
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%c = load float* %idx3, align 8
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%vec4 = insertelement <4 x float> %vec2, float %c, i32 2
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%idx5 = getelementptr inbounds float* %ptr, i64 3
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%d = load float* %idx5, align 8
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%vec6 = insertelement <4 x float> %vec4, float %d, i32 3
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ret <4 x float> %vec6
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; ALL-LABEL: merge_4_floats
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; ALL: vmovups
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; ALL-NEXT: retq
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}
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; PR21710 ( http://llvm.org/bugs/show_bug.cgi?id=21710 )
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; Make sure that 32-byte vectors are handled efficiently.
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; If the target has slow 32-byte accesses, we should still generate
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; 16-byte loads.
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define <8 x float> @merge_8_floats(float* %ptr) {
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%a = load float* %ptr, align 4
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%vec = insertelement <8 x float> undef, float %a, i32 0
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%idx1 = getelementptr inbounds float* %ptr, i64 1
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%b = load float* %idx1, align 4
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%vec2 = insertelement <8 x float> %vec, float %b, i32 1
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%idx3 = getelementptr inbounds float* %ptr, i64 2
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%c = load float* %idx3, align 4
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%vec4 = insertelement <8 x float> %vec2, float %c, i32 2
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%idx5 = getelementptr inbounds float* %ptr, i64 3
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%d = load float* %idx5, align 4
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%vec6 = insertelement <8 x float> %vec4, float %d, i32 3
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%idx7 = getelementptr inbounds float* %ptr, i64 4
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%e = load float* %idx7, align 4
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%vec8 = insertelement <8 x float> %vec6, float %e, i32 4
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%idx9 = getelementptr inbounds float* %ptr, i64 5
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%f = load float* %idx9, align 4
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%vec10 = insertelement <8 x float> %vec8, float %f, i32 5
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%idx11 = getelementptr inbounds float* %ptr, i64 6
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%g = load float* %idx11, align 4
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%vec12 = insertelement <8 x float> %vec10, float %g, i32 6
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%idx13 = getelementptr inbounds float* %ptr, i64 7
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%h = load float* %idx13, align 4
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%vec14 = insertelement <8 x float> %vec12, float %h, i32 7
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ret <8 x float> %vec14
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; ALL-LABEL: merge_8_floats
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; FAST32: vmovups
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; FAST32-NEXT: retq
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; SLOW32: vmovups
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; SLOW32: vinsertf128
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; SLOW32-NEXT: retq
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}
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define <4 x double> @merge_4_doubles(double* %ptr) {
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%a = load double* %ptr, align 8
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%vec = insertelement <4 x double> undef, double %a, i32 0
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%idx1 = getelementptr inbounds double* %ptr, i64 1
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%b = load double* %idx1, align 8
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%vec2 = insertelement <4 x double> %vec, double %b, i32 1
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%idx3 = getelementptr inbounds double* %ptr, i64 2
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%c = load double* %idx3, align 8
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%vec4 = insertelement <4 x double> %vec2, double %c, i32 2
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%idx5 = getelementptr inbounds double* %ptr, i64 3
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%d = load double* %idx5, align 8
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%vec6 = insertelement <4 x double> %vec4, double %d, i32 3
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ret <4 x double> %vec6
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; ALL-LABEL: merge_4_doubles
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; FAST32: vmovups
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; FAST32-NEXT: retq
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; SLOW32: vmovups
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; SLOW32: vinsertf128
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; SLOW32-NEXT: retq
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}
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