1c305aebd6
A patch from May 2013, commit 1e211913b56f390, changed SROA into using a select instruction to perform vector blend. Idea was that using a select was the canonical form, and that we optimize select better than shufflevector. This patch is changing SROA back into using shufflevector instead of select when doing the blend (inserting a smaller vector into a larger vector). Motivation: Nowadays InstCombine is canonicalizing this kind of vector blends, using vector select instructions, into a shufflevector instruction. So it is assumed that shufflevector is the canonical form now. It is also assumed that we are better at optimizing shufflevector today, compared to back in 2013. Commit f26710d97d9c272be8a55 includes links to a discussion from 2016 (https://discourse.llvm.org/t/ir-canonicalization-vector-select-or-shufflevector/42257/6) about picking shufflevector as the canonical form.
105 lines
5.3 KiB
LLVM
105 lines
5.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes='sroa<preserve-cfg>' -S | FileCheck %s --check-prefixes=CHECK,CHECK-PRESERVE-CFG
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; RUN: opt < %s -passes='sroa<modify-cfg>' -S | FileCheck %s --check-prefixes=CHECK,CHECK-MODIFY-CFG
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
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define <4 x i64> @vector_ptrtoint({<2 x ptr>, <2 x ptr>} %x) {
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; CHECK-LABEL: @vector_ptrtoint(
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; CHECK-NEXT: [[X_FCA_0_EXTRACT:%.*]] = extractvalue { <2 x ptr>, <2 x ptr> } [[X:%.*]], 0
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; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint <2 x ptr> [[X_FCA_0_EXTRACT]] to <2 x i64>
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; CHECK-NEXT: [[A_SROA_0_0_VEC_EXPAND:%.*]] = shufflevector <2 x i64> [[TMP1]], <2 x i64> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
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; CHECK-NEXT: [[A_SROA_0_0_VECBLEND:%.*]] = shufflevector <4 x i64> [[A_SROA_0_0_VEC_EXPAND]], <4 x i64> undef, <4 x i32> <i32 0, i32 1, i32 6, i32 7>
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; CHECK-NEXT: [[X_FCA_1_EXTRACT:%.*]] = extractvalue { <2 x ptr>, <2 x ptr> } [[X]], 1
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; CHECK-NEXT: [[TMP2:%.*]] = ptrtoint <2 x ptr> [[X_FCA_1_EXTRACT]] to <2 x i64>
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; CHECK-NEXT: [[A_SROA_0_16_VEC_EXPAND:%.*]] = shufflevector <2 x i64> [[TMP2]], <2 x i64> poison, <4 x i32> <i32 poison, i32 poison, i32 0, i32 1>
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; CHECK-NEXT: [[A_SROA_0_16_VECBLEND:%.*]] = shufflevector <4 x i64> [[A_SROA_0_16_VEC_EXPAND]], <4 x i64> [[A_SROA_0_0_VECBLEND]], <4 x i32> <i32 4, i32 5, i32 2, i32 3>
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; CHECK-NEXT: ret <4 x i64> [[A_SROA_0_16_VECBLEND]]
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;
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%a = alloca {<2 x ptr>, <2 x ptr>}, align 32
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store {<2 x ptr>, <2 x ptr>} %x, ptr %a
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%vec = load <4 x i64>, ptr %a
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ret <4 x i64> %vec
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}
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define <4 x ptr> @vector_inttoptr({<2 x i64>, <2 x i64>} %x) {
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; CHECK-LABEL: @vector_inttoptr(
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; CHECK-NEXT: [[X_FCA_0_EXTRACT:%.*]] = extractvalue { <2 x i64>, <2 x i64> } [[X:%.*]], 0
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; CHECK-NEXT: [[TMP1:%.*]] = inttoptr <2 x i64> [[X_FCA_0_EXTRACT]] to <2 x ptr>
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; CHECK-NEXT: [[A_SROA_0_0_VEC_EXPAND:%.*]] = shufflevector <2 x ptr> [[TMP1]], <2 x ptr> poison, <4 x i32> <i32 0, i32 1, i32 poison, i32 poison>
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; CHECK-NEXT: [[A_SROA_0_0_VECBLEND:%.*]] = shufflevector <4 x ptr> [[A_SROA_0_0_VEC_EXPAND]], <4 x ptr> undef, <4 x i32> <i32 0, i32 1, i32 6, i32 7>
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; CHECK-NEXT: [[X_FCA_1_EXTRACT:%.*]] = extractvalue { <2 x i64>, <2 x i64> } [[X]], 1
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; CHECK-NEXT: [[TMP2:%.*]] = inttoptr <2 x i64> [[X_FCA_1_EXTRACT]] to <2 x ptr>
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; CHECK-NEXT: [[A_SROA_0_16_VEC_EXPAND:%.*]] = shufflevector <2 x ptr> [[TMP2]], <2 x ptr> poison, <4 x i32> <i32 poison, i32 poison, i32 0, i32 1>
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; CHECK-NEXT: [[A_SROA_0_16_VECBLEND:%.*]] = shufflevector <4 x ptr> [[A_SROA_0_16_VEC_EXPAND]], <4 x ptr> [[A_SROA_0_0_VECBLEND]], <4 x i32> <i32 4, i32 5, i32 2, i32 3>
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; CHECK-NEXT: ret <4 x ptr> [[A_SROA_0_16_VECBLEND]]
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;
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%a = alloca {<2 x i64>, <2 x i64>}, align 32
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store {<2 x i64>, <2 x i64>} %x, ptr %a
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%vec = load <4 x ptr>, ptr %a
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ret <4 x ptr> %vec
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}
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define <2 x i64> @vector_ptrtointbitcast({<1 x ptr>, <1 x ptr>} %x) {
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; CHECK-LABEL: @vector_ptrtointbitcast(
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; CHECK-NEXT: [[X_FCA_0_EXTRACT:%.*]] = extractvalue { <1 x ptr>, <1 x ptr> } [[X:%.*]], 0
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; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint <1 x ptr> [[X_FCA_0_EXTRACT]] to <1 x i64>
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast <1 x i64> [[TMP1]] to i64
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; CHECK-NEXT: [[A_SROA_0_0_VEC_INSERT:%.*]] = insertelement <2 x i64> undef, i64 [[TMP2]], i32 0
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; CHECK-NEXT: [[X_FCA_1_EXTRACT:%.*]] = extractvalue { <1 x ptr>, <1 x ptr> } [[X]], 1
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; CHECK-NEXT: [[TMP3:%.*]] = ptrtoint <1 x ptr> [[X_FCA_1_EXTRACT]] to <1 x i64>
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; CHECK-NEXT: [[TMP4:%.*]] = bitcast <1 x i64> [[TMP3]] to i64
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; CHECK-NEXT: [[A_SROA_0_8_VEC_INSERT:%.*]] = insertelement <2 x i64> [[A_SROA_0_0_VEC_INSERT]], i64 [[TMP4]], i32 1
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; CHECK-NEXT: ret <2 x i64> [[A_SROA_0_8_VEC_INSERT]]
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;
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%a = alloca {<1 x ptr>, <1 x ptr>}, align 16
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store {<1 x ptr>, <1 x ptr>} %x, ptr %a
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%vec = load <2 x i64>, ptr %a
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ret <2 x i64> %vec
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}
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define <2 x ptr> @vector_inttoptrbitcast_vector({<16 x i8>, <16 x i8>} %x) {
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; CHECK-LABEL: @vector_inttoptrbitcast_vector(
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; CHECK-NEXT: [[X_FCA_0_EXTRACT:%.*]] = extractvalue { <16 x i8>, <16 x i8> } [[X:%.*]], 0
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast <16 x i8> [[X_FCA_0_EXTRACT]] to <2 x i64>
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; CHECK-NEXT: [[TMP2:%.*]] = inttoptr <2 x i64> [[TMP1]] to <2 x ptr>
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; CHECK-NEXT: [[X_FCA_1_EXTRACT:%.*]] = extractvalue { <16 x i8>, <16 x i8> } [[X]], 1
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; CHECK-NEXT: ret <2 x ptr> [[TMP2]]
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;
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%a = alloca {<16 x i8>, <16 x i8>}, align 16
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store {<16 x i8>, <16 x i8>} %x, ptr %a
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%vec = load <2 x ptr>, ptr %a
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ret <2 x ptr> %vec
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}
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define <16 x i8> @vector_ptrtointbitcast_vector({<2 x ptr>, <2 x ptr>} %x) {
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; CHECK-LABEL: @vector_ptrtointbitcast_vector(
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; CHECK-NEXT: [[X_FCA_0_EXTRACT:%.*]] = extractvalue { <2 x ptr>, <2 x ptr> } [[X:%.*]], 0
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; CHECK-NEXT: [[X_FCA_1_EXTRACT:%.*]] = extractvalue { <2 x ptr>, <2 x ptr> } [[X]], 1
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; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint <2 x ptr> [[X_FCA_0_EXTRACT]] to <2 x i64>
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast <2 x i64> [[TMP1]] to <16 x i8>
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; CHECK-NEXT: ret <16 x i8> [[TMP2]]
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;
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%a = alloca {<2 x ptr>, <2 x ptr>}, align 16
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store {<2 x ptr>, <2 x ptr>} %x, ptr %a
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%vec = load <16 x i8>, ptr %a
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ret <16 x i8> %vec
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}
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;; NOTE: These prefixes are unused and the list is autogenerated. Do not add tests below this line:
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; CHECK-MODIFY-CFG: {{.*}}
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; CHECK-PRESERVE-CFG: {{.*}}
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