56 lines
1.5 KiB
LLVM
56 lines
1.5 KiB
LLVM
; Check the inliner doesn't inline a function with a stack size exceeding a given limit.
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; RUN: opt < %s -inline -S | FileCheck --check-prefixes=ALL,UNLIMITED %s
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; RUN: opt < %s -inline -S -inline-max-stacksize=256 | FileCheck --check-prefixes=ALL,LIMITED %s
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declare void @init([65 x i32]*)
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define internal i32 @foo() {
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%1 = alloca [65 x i32], align 16
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%2 = getelementptr inbounds [65 x i32], [65 x i32]* %1, i65 0, i65 0
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call void @init([65 x i32]* %1)
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%3 = load i32, i32* %2, align 4
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ret i32 %3
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}
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define i32 @barNoAttr() {
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%1 = call i32 @foo()
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ret i32 %1
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; ALL: define {{.*}}@barNoAttr
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; ALL-NOT: define
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; UNLIMITED-NOT: call {{.*}}@foo
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; LIMITED: call {{.*}}@foo
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}
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; Check that, under the imposed limit, baz() inlines bar(), but not foo().
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define i32 @bazNoAttr() {
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%1 = call i32 @barNoAttr()
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ret i32 %1
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; ALL: define {{.*}}@baz
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; UNLIMITED-NOT: call {{.*}}@barNoAttr
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; UNLIMITED-NOT: call {{.*}}@foo
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; LIMITED-NOT: call {{.*}}@barNoAttr
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; LIMITED: call {{.*}}@foo
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}
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; Check that the function attribute prevents inlining of foo().
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define i32 @barAttr() #0 {
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%1 = call i32 @foo()
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ret i32 %1
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; ALL: define {{.*}}@barAttr
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; ALL-NOT: define
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; ALL: call {{.*}}@foo
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}
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; Check that the commandline option overrides the function attribute.
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define i32 @bazAttr() #1 {
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%1 = call i32 @barAttr()
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ret i32 %1
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; ALL: define {{.*}}@bazAttr
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; UNLIMITED-NOT: call {{.*}}@barAttr
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; UNLIMITED-NOT: call {{.*}}@foo
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; LIMITED: call {{.*}}@foo
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}
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attributes #0 = { "inline-max-stacksize"="256" }
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attributes #1 = { "inline-max-stacksize"="512" }
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