113 lines
2.6 KiB
LLVM
113 lines
2.6 KiB
LLVM
; RUN: opt < %s -basicaa -sink -S | FileCheck %s
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declare i32 @f_load_global() nounwind readonly
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declare i32 @f_load_arg(i32*) nounwind readonly argmemonly
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declare void @f_store_global(i32) nounwind
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declare void @f_store_arg(i32*) nounwind argmemonly
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declare void @f_readonly_arg(i32* readonly, i32*) nounwind argmemonly
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declare i32 @f_readnone(i32) nounwind readnone
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@A = external global i32
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@B = external global i32
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; Sink readonly call if no stores are in the way.
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;
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; CHECK-LABEL: @test_sink_no_stores(
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; CHECK: true:
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; CHECK-NEXT: %l = call i32 @f_load_global
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; CHECK-NEXT: ret i32 %l
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define i32 @test_sink_no_stores(i1 %z) {
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%l = call i32 @f_load_global()
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; CHECK-LABEL: @test_sink_argmem_store(
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; CHECK: true:
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; CHECK-NEXT: %l = call i32 @f_load_arg
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; CHECK-NEXT: ret i32 %l
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define i32 @test_sink_argmem_store(i1 %z) {
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%l = call i32 @f_load_arg(i32* @A)
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store i32 0, i32* @B
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; CHECK-LABEL: @test_sink_argmem_call(
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; CHECK: true:
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; CHECK-NEXT: %l = call i32 @f_load_arg
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; CHECK-NEXT: ret i32 %l
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define i32 @test_sink_argmem_call(i1 %z) {
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%l = call i32 @f_load_arg(i32* @A)
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call void @f_store_arg(i32* @B)
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; CHECK-LABEL: @test_sink_argmem_multiple(
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; CHECK: true:
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; CHECK-NEXT: %l = call i32 @f_load_arg
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; CHECK-NEXT: ret i32 %l
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define i32 @test_sink_argmem_multiple(i1 %z) {
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%l = call i32 @f_load_arg(i32* @A)
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call void @f_readonly_arg(i32* @A, i32* @B)
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; But don't sink if there is a store.
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;
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; CHECK-LABEL: @test_nosink_store(
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; CHECK: call i32 @f_load_global
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; CHECK-NEXT: store i32
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define i32 @test_nosink_store(i1 %z) {
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%l = call i32 @f_load_global()
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store i32 0, i32* @A
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; CHECK-LABEL: @test_nosink_call(
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; CHECK: call i32 @f_load_global
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; CHECK-NEXT: call void @f_store_global
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define i32 @test_nosink_call(i1 %z) {
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%l = call i32 @f_load_global()
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call void @f_store_global(i32 0)
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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; readnone calls are sunk across stores.
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;
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; CHECK-LABEL: @test_sink_readnone(
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; CHECK: true:
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; CHECK-NEXT: %l = call i32 @f_readnone(
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; CHECK-NEXT: ret i32 %l
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define i32 @test_sink_readnone(i1 %z) {
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%l = call i32 @f_readnone(i32 0)
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store i32 0, i32* @A
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br i1 %z, label %true, label %false
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true:
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ret i32 %l
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false:
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ret i32 0
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}
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