99 lines
2.5 KiB
LLVM
99 lines
2.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -passes=early-cse -earlycse-debug-hash < %s | FileCheck %s
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; While it is normally okay to do memory optimizations over calls to
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; @readonly_function and @readnone_function, we cannot do that if
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; they're carrying unknown operand bundles since the presence of
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; unknown operand bundles implies arbitrary memory effects.
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declare void @readonly_function() readonly nounwind willreturn
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declare void @readnone_function() readnone nounwind willreturn
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define i32 @test0(i32* %x) {
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; CHECK-LABEL: @test0(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 100, i32* [[X:%.*]], align 4
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; CHECK-NEXT: call void @readonly_function() [ "tag"() ]
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; CHECK-NEXT: [[V:%.*]] = load i32, i32* [[X]], align 4
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; CHECK-NEXT: ret i32 [[V]]
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;
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entry:
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store i32 100, i32* %x
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call void @readonly_function() [ "tag"() ]
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%v = load i32, i32* %x
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ret i32 %v
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}
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define i32 @test1(i32* %x) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 100, i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret i32 100
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;
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entry:
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store i32 100, i32* %x
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call void @readonly_function() readonly [ "tag"() ]
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%v = load i32, i32* %x
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ret i32 %v
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}
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define i32 @test3(i32* %x) {
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; CHECK-LABEL: @test3(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 100, i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret i32 100
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;
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entry:
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store i32 100, i32* %x
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call void @readonly_function()
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%v = load i32, i32* %x
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ret i32 %v
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}
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define void @test4(i32* %x) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 100, i32* [[X:%.*]], align 4
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; CHECK-NEXT: call void @readnone_function() [ "tag"() ]
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; CHECK-NEXT: store i32 200, i32* [[X]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 100, i32* %x
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call void @readnone_function() [ "tag"() ]
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store i32 200, i32* %x
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ret void
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}
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define void @test5(i32* %x) {
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; CHECK-LABEL: @test5(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 200, i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 100, i32* %x
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call void @readnone_function() readnone [ "tag"() ]
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store i32 200, i32* %x
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ret void
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}
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define void @test6(i32* %x) {
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; The "deopt" operand bundle does not make the call to
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; @readonly_function read-write; and so the nounwind readonly call can
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; be deleted.
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; CHECK-LABEL: @test6(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 200, i32* [[X:%.*]], align 4
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; CHECK-NEXT: ret void
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;
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entry:
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store i32 100, i32* %x
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call void @readonly_function() [ "deopt"() ]
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store i32 200, i32* %x
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ret void
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}
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