70 lines
1.3 KiB
LLVM
70 lines
1.3 KiB
LLVM
; RUN: opt -S -basicaa -licm %s | FileCheck %s
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declare i32 @foo() readonly argmemonly nounwind
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declare i32 @foo2() readonly nounwind
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declare i32 @bar(i32* %loc2) readonly argmemonly nounwind
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define void @test(i32* %loc) {
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; CHECK-LABEL: @test
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; CHECK: @foo
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; CHECK-LABEL: loop:
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br label %loop
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loop:
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%res = call i32 @foo()
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store i32 %res, i32* %loc
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br label %loop
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}
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; Negative test: show argmemonly is required
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define void @test_neg(i32* %loc) {
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; CHECK-LABEL: @test_neg
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; CHECK-LABEL: loop:
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; CHECK: @foo
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br label %loop
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loop:
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%res = call i32 @foo2()
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store i32 %res, i32* %loc
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br label %loop
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}
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define void @test2(i32* noalias %loc, i32* noalias %loc2) {
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; CHECK-LABEL: @test2
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; CHECK: @bar
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; CHECK-LABEL: loop:
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br label %loop
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loop:
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%res = call i32 @bar(i32* %loc2)
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store i32 %res, i32* %loc
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br label %loop
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}
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; Negative test: %might clobber gep
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define void @test3(i32* %loc) {
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; CHECK-LABEL: @test3
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; CHECK-LABEL: loop:
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; CHECK: @bar
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br label %loop
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loop:
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%res = call i32 @bar(i32* %loc)
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%gep = getelementptr i32, i32 *%loc, i64 1000000
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store i32 %res, i32* %gep
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br label %loop
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}
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; Negative test: %loc might alias %loc2
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define void @test4(i32* %loc, i32* %loc2) {
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; CHECK-LABEL: @test4
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; CHECK-LABEL: loop:
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; CHECK: @bar
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br label %loop
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loop:
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%res = call i32 @bar(i32* %loc2)
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store i32 %res, i32* %loc
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br label %loop
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}
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