[llvm] aa03327 - [X86][AVX] Add missing X86ISD::VBROADCAST(v2i64 -> v4i64) isel pattern for AVX1 targets (#102853)
via llvm-commits
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Tue Aug 13 00:05:47 PDT 2024
Author: Mészáros Gergely
Date: 2024-08-13T15:05:44+08:00
New Revision: aa03327a463ac4d538127e3fc03476a5f42b2bb1
URL: https://github.com/llvm/llvm-project/commit/aa03327a463ac4d538127e3fc03476a5f42b2bb1
DIFF: https://github.com/llvm/llvm-project/commit/aa03327a463ac4d538127e3fc03476a5f42b2bb1.diff
LOG: [X86][AVX] Add missing X86ISD::VBROADCAST(v2i64 -> v4i64) isel pattern for AVX1 targets (#102853)
An internal bug revealed that this form can be formed from existing
combines, and then fail to select. Use the same pattern as v2f64 ->
v4f64 (the instructions are moving bits around the actual type does not
matter here).
Added:
Modified:
llvm/lib/Target/X86/X86InstrSSE.td
llvm/test/CodeGen/X86/combine-concatvectors.ll
Removed:
################################################################################
diff --git a/llvm/lib/Target/X86/X86InstrSSE.td b/llvm/lib/Target/X86/X86InstrSSE.td
index 5f9211edfa161b..4e5f2e3f872ad4 100644
--- a/llvm/lib/Target/X86/X86InstrSSE.td
+++ b/llvm/lib/Target/X86/X86InstrSSE.td
@@ -7797,6 +7797,11 @@ let Predicates = [HasAVX1Only] in {
(VPSHUFDri (VMOV64toPQIrr GR64:$src), 0x44)>;
def : Pat<(v2i64 (X86VBroadcastld64 addr:$src)),
(VMOVDDUPrm addr:$src)>;
+
+ def : Pat<(v4i64 (X86VBroadcast v2i64:$src)),
+ (VINSERTF128rr (INSERT_SUBREG (v4i64 (IMPLICIT_DEF)),
+ (v2i64 (VPSHUFDri VR128:$src, 0x44)), sub_xmm),
+ (v2i64 (VPSHUFDri VR128:$src, 0x44)), 1)>;
}
//===----------------------------------------------------------------------===//
diff --git a/llvm/test/CodeGen/X86/combine-concatvectors.ll b/llvm/test/CodeGen/X86/combine-concatvectors.ll
index 17d22607cfea88..230afd1461935d 100644
--- a/llvm/test/CodeGen/X86/combine-concatvectors.ll
+++ b/llvm/test/CodeGen/X86/combine-concatvectors.ll
@@ -118,3 +118,26 @@ define <4 x float> @concat_of_broadcast_v4f32_v8f32(ptr %a0, ptr %a1, ptr %a2) {
%shuffle1 = shufflevector <8 x float> %ld2, <8 x float> %shuffle, <4 x i32> <i32 6, i32 15, i32 12, i32 3>
ret <4 x float> %shuffle1
}
+
+define <4 x i64> @broadcast_of_shuffle_v2i64_v4i64(<16 x i8> %vecinit.i) {
+; AVX1-LABEL: broadcast_of_shuffle_v2i64_v4i64:
+; AVX1: # %bb.0: # %entry
+; AVX1-NEXT: vpsllq $56, %xmm0, %xmm0
+; AVX1-NEXT: vpshufd {{.*#+}} xmm0 = xmm0[0,1,0,1]
+; AVX1-NEXT: vinsertf128 $1, %xmm0, %ymm0, %ymm0
+; AVX1-NEXT: retq
+;
+; AVX2-LABEL: broadcast_of_shuffle_v2i64_v4i64:
+; AVX2: # %bb.0: # %entry
+; AVX2-NEXT: vpsllq $56, %xmm0, %xmm0
+; AVX2-NEXT: vpbroadcastq %xmm0, %ymm0
+; AVX2-NEXT: retq
+entry:
+ %vecinit15.i = shufflevector <16 x i8> %vecinit.i, <16 x i8> poison, <16 x i32> zeroinitializer
+ %0 = bitcast <16 x i8> %vecinit15.i to <2 x i64>
+ %1 = extractelement <2 x i64> %0, i64 0
+ %2 = and i64 %1, -72057594037927936 ; 0xFF00 0000 0000 0000
+ %3 = insertelement <4 x i64> poison, i64 %2, i64 0
+ %4 = shufflevector <4 x i64> %3, <4 x i64> poison, <4 x i32> zeroinitializer
+ ret <4 x i64> %4
+}
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