https://github.com/momchil-velikov updated https://github.com/llvm/llvm-project/pull/91965
>From b1b69ffcaf4525a66dde1ae7f1a022c85204a579 Mon Sep 17 00:00:00 2001 From: Momchil Velikov <momchil.veli...@arm.com> Date: Mon, 20 May 2024 16:25:43 +0100 Subject: [PATCH 1/2] [Clang][AArch64][SVE] Allow write to SVE vector elements using the subscript operator The patch at https://reviews.llvm.org/D122732 introduced using the array subscript operator for SVE vectors, however it also causes an ICE when the subscripting expression is used as an lvalue. This patches fixes the error. Lvalue subscripting expressions are emitted as LLVM IR `insertvector`. Change-Id: I46d0333d8ed8508cd9cd23e02dd1c2d48fb74cd2 --- clang/lib/CodeGen/CGExpr.cpp | 2 +- clang/lib/Sema/SemaExpr.cpp | 2 +- clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c | 10 ++++++++++ 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/clang/lib/CodeGen/CGExpr.cpp b/clang/lib/CodeGen/CGExpr.cpp index cd1c48b420382..6f9237e2067f5 100644 --- a/clang/lib/CodeGen/CGExpr.cpp +++ b/clang/lib/CodeGen/CGExpr.cpp @@ -4180,7 +4180,7 @@ LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E, // If the base is a vector type, then we are forming a vector element lvalue // with this subscript. - if (E->getBase()->getType()->isVectorType() && + if (E->getBase()->getType()->isSubscriptableVectorType() && !isa<ExtVectorElementExpr>(E->getBase())) { // Emit the vector as an lvalue to get its address. LValue LHS = EmitLValue(E->getBase()); diff --git a/clang/lib/Sema/SemaExpr.cpp b/clang/lib/Sema/SemaExpr.cpp index 326879b0883fa..49541edf106e1 100644 --- a/clang/lib/Sema/SemaExpr.cpp +++ b/clang/lib/Sema/SemaExpr.cpp @@ -5185,7 +5185,7 @@ Sema::CreateBuiltinArraySubscriptExpr(Expr *Base, SourceLocation LLoc, } // Perform default conversions. - if (!LHSExp->getType()->getAs<VectorType>()) { + if (!LHSExp->getType()->isSubscriptableVectorType()) { ExprResult Result = DefaultFunctionArrayLvalueConversion(LHSExp); if (Result.isInvalid()) return ExprError(); diff --git a/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c b/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c index fb60c6d100ce6..634423765c4c3 100644 --- a/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c +++ b/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c @@ -88,3 +88,13 @@ float subscript_float32(svfloat32_t a, size_t b) { double subscript_float64(svfloat64_t a, size_t b) { return a[b]; } + +// CHECK-LABEL: @subscript_write_float32( +// CHECK-NEXT: entry: +// CHECK-NEXT: [[VECINS:%.*]] = insertelement <vscale x 4 x float> [[A:%.*]], float 1.000000e+00, i64 [[B:%.*]] +// CHECK-NEXT: ret <vscale x 4 x float> [[VECINS]] +// +svfloat32_t subscript_write_float32(svfloat32_t a, size_t b) { + a[b] = 1.0f; + return a; +} >From 08a155b49a6b9c859ba8569170e0f71e63b76735 Mon Sep 17 00:00:00 2001 From: Momchil Velikov <momchil.veli...@arm.com> Date: Mon, 20 May 2024 16:26:06 +0100 Subject: [PATCH 2/2] [fixiup] Add a test using compound assignment operator Change-Id: I81e1fd4f23eb65a96e71015de7a4562fcbc53c0f --- .../test/CodeGen/aarch64-sve-vector-subscript-ops.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c b/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c index 634423765c4c3..52a05d010de9b 100644 --- a/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c +++ b/clang/test/CodeGen/aarch64-sve-vector-subscript-ops.c @@ -98,3 +98,15 @@ svfloat32_t subscript_write_float32(svfloat32_t a, size_t b) { a[b] = 1.0f; return a; } + +// CHECK-LABEL: @subscript_read_write_float32( +// CHECK-NEXT: entry: +// CHECK-NEXT: [[VECEXT:%.*]] = extractelement <vscale x 4 x float> [[A:%.*]], i64 [[B:%.*]] +// CHECK-NEXT: [[ADD:%.*]] = fadd float [[VECEXT]], 1.000000e+00 +// CHECK-NEXT: [[VECINS:%.*]] = insertelement <vscale x 4 x float> [[A]], float [[ADD]], i64 [[B]] +// CHECK-NEXT: ret <vscale x 4 x float> [[VECINS]] +// +svfloat32_t subscript_read_write_float32(svfloat32_t a, size_t b) { + a[b] += 1.0f; + return a; +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
