mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-17 21:35:07 +00:00
87 lines
2.7 KiB
LLVM
87 lines
2.7 KiB
LLVM
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; RUN: opt -instcombine -S < %s | FileCheck %s
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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: load i32* %{{.*}}, !tbaa !0
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entry:
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%l = load 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: load i32* %{{.*}}, !alias.scope !2, !noalias !1
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entry:
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%l = load float* %ptr, !alias.scope !2, !noalias !1
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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: load float* %{{.*}}
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; CHECK-NOT: !range
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; CHECK: ret float
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entry:
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%l = load 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: load i32* %{{.*}}, !invariant.load !3
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entry:
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%l = load float* %ptr, !invariant.load !3
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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: load i32* %{{.*}}, !nontemporal !4
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entry:
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%l = load float* %ptr, !nontemporal !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 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: load i32* %{{.*}}, !llvm.mem.parallel_loop_access !1
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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* %src, i32 %i
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%dst.gep = getelementptr inbounds i32* %dst, i32 %i
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%l = load float* %src.gep, !llvm.mem.parallel_loop_access !1
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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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!0 = metadata !{ metadata !1, metadata !1, i64 0 }
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!1 = metadata !{ metadata !1 }
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!2 = metadata !{ metadata !2, metadata !1 }
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!3 = metadata !{ }
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!4 = metadata !{ i32 1 }
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!5 = metadata !{ i32 0, i32 42 }
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