188 lines
6.5 KiB
LLVM
188 lines
6.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -instcombine -S < %s | FileCheck %s
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target datalayout = "e-m:e-p:64:64:64-i64:64-f80:128-n8:16:32:64-S128"
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define i32 @test_load_cast_combine_tbaa(float* %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves TBAA.
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; CHECK-LABEL: @test_load_cast_combine_tbaa(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast float* [[PTR:%.*]] to i32*
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; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[TMP0]], align 4, [[TBAA0:!tbaa !.*]]
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; CHECK-NEXT: ret i32 [[L1]]
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;
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entry:
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%l = load float, float* %ptr, !tbaa !0
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%c = bitcast float %l to i32
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ret i32 %c
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}
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define i32 @test_load_cast_combine_noalias(float* %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves no-alias metadata.
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; CHECK-LABEL: @test_load_cast_combine_noalias(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast float* [[PTR:%.*]] to i32*
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; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[TMP0]], align 4, !alias.scope !3, !noalias !4
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; CHECK-NEXT: ret i32 [[L1]]
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;
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entry:
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%l = load float, float* %ptr, !alias.scope !3, !noalias !4
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%c = bitcast float %l to i32
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ret i32 %c
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}
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define float @test_load_cast_combine_range(i32* %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) drops range metadata. It
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; would be nice to preserve or update it somehow but this is hard when moving
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; between types.
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; CHECK-LABEL: @test_load_cast_combine_range(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32* [[PTR:%.*]] to float*
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; CHECK-NEXT: [[L1:%.*]] = load float, float* [[TMP0]], align 4
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; CHECK-NEXT: ret float [[L1]]
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;
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entry:
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%l = load i32, i32* %ptr, !range !5
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%c = bitcast i32 %l to float
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ret float %c
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}
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define i32 @test_load_cast_combine_invariant(float* %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves invariant metadata.
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; CHECK-LABEL: @test_load_cast_combine_invariant(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast float* [[PTR:%.*]] to i32*
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; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[TMP0]], align 4, !invariant.load !7
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; CHECK-NEXT: ret i32 [[L1]]
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;
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entry:
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%l = load float, float* %ptr, !invariant.load !6
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%c = bitcast float %l to i32
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ret i32 %c
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}
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define i32 @test_load_cast_combine_nontemporal(float* %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves nontemporal
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; metadata.
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; CHECK-LABEL: @test_load_cast_combine_nontemporal(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast float* [[PTR:%.*]] to i32*
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; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[TMP0]], align 4, !nontemporal !8
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; CHECK-NEXT: ret i32 [[L1]]
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;
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entry:
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%l = load float, float* %ptr, !nontemporal !7
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%c = bitcast float %l to i32
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ret i32 %c
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}
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define i8* @test_load_cast_combine_align(i32** %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves align
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; metadata.
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; CHECK-LABEL: @test_load_cast_combine_align(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32** [[PTR:%.*]] to i8**
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; CHECK-NEXT: [[L1:%.*]] = load i8*, i8** [[TMP0]], align 8, !align !9
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; CHECK-NEXT: ret i8* [[L1]]
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;
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entry:
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%l = load i32*, i32** %ptr, !align !8
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%c = bitcast i32* %l to i8*
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ret i8* %c
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}
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define i8* @test_load_cast_combine_deref(i32** %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves dereferenceable
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; metadata.
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; CHECK-LABEL: @test_load_cast_combine_deref(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32** [[PTR:%.*]] to i8**
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; CHECK-NEXT: [[L1:%.*]] = load i8*, i8** [[TMP0]], align 8, !dereferenceable !9
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; CHECK-NEXT: ret i8* [[L1]]
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;
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entry:
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%l = load i32*, i32** %ptr, !dereferenceable !8
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%c = bitcast i32* %l to i8*
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ret i8* %c
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}
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define i8* @test_load_cast_combine_deref_or_null(i32** %ptr) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves
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; dereferenceable_or_null metadata.
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; CHECK-LABEL: @test_load_cast_combine_deref_or_null(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i32** [[PTR:%.*]] to i8**
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; CHECK-NEXT: [[L1:%.*]] = load i8*, i8** [[TMP0]], align 8, !dereferenceable_or_null !9
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; CHECK-NEXT: ret i8* [[L1]]
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;
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entry:
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%l = load i32*, i32** %ptr, !dereferenceable_or_null !8
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%c = bitcast i32* %l to i8*
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ret i8* %c
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}
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define void @test_load_cast_combine_loop(float* %src, i32* %dst, i32 %n) {
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; Ensure (cast (load (...))) -> (load (cast (...))) preserves loop access
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; metadata.
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; CHECK-LABEL: @test_load_cast_combine_loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[I_NEXT:%.*]], [[LOOP]] ]
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; CHECK-NEXT: [[TMP0:%.*]] = sext i32 [[I]] to i64
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; CHECK-NEXT: [[SRC_GEP:%.*]] = getelementptr inbounds float, float* [[SRC:%.*]], i64 [[TMP0]]
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; CHECK-NEXT: [[TMP1:%.*]] = sext i32 [[I]] to i64
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; CHECK-NEXT: [[DST_GEP:%.*]] = getelementptr inbounds i32, i32* [[DST:%.*]], i64 [[TMP1]]
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast float* [[SRC_GEP]] to i32*
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; CHECK-NEXT: [[L1:%.*]] = load i32, i32* [[TMP2]], align 4, !llvm.access.group !6
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; CHECK-NEXT: store i32 [[L1]], i32* [[DST_GEP]], align 4
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; CHECK-NEXT: [[I_NEXT]] = add i32 [[I]], 1
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; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I_NEXT]], [[N:%.*]]
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; CHECK-NEXT: br i1 [[CMP]], label [[LOOP]], label [[EXIT:%.*]], [[LOOP1:!llvm.loop !.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%i = phi i32 [ 0, %entry ], [ %i.next, %loop ]
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%src.gep = getelementptr inbounds float, float* %src, i32 %i
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%dst.gep = getelementptr inbounds i32, i32* %dst, i32 %i
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%l = load float, float* %src.gep, !llvm.access.group !9
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%c = bitcast float %l to i32
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store i32 %c, i32* %dst.gep
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%i.next = add i32 %i, 1
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%cmp = icmp slt i32 %i.next, %n
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br i1 %cmp, label %loop, label %exit, !llvm.loop !1
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exit:
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ret void
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}
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define void @test_load_cast_combine_nonnull(float** %ptr) {
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; CHECK-LABEL: @test_load_cast_combine_nonnull(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[P:%.*]] = load float*, float** [[PTR:%.*]], align 8, !nonnull !7
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr float*, float** [[PTR]], i64 42
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; CHECK-NEXT: store float* [[P]], float** [[GEP]], align 8
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; CHECK-NEXT: ret void
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;
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entry:
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%p = load float*, float** %ptr, !nonnull !6
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%gep = getelementptr float*, float** %ptr, i32 42
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store float* %p, float** %gep
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ret void
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}
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!0 = !{!1, !1, i64 0}
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!1 = !{!"scalar type", !2}
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!2 = !{!"root"}
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!3 = distinct !{!3, !4}
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!4 = distinct !{!4, !{!"llvm.loop.parallel_accesses", !9}}
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!5 = !{i32 0, i32 42}
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!6 = !{}
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!7 = !{i32 1}
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!8 = !{i64 8}
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!9 = distinct !{}
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