71 lines
2.4 KiB
LLVM
71 lines
2.4 KiB
LLVM
; Check the optimizer doesn't crash at inlining the function top and all of its callees are inlined.
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; RUN: opt < %s -O3 -S | FileCheck %s
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define dso_local void (...)* @second(i8** %p) {
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entry:
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%p.addr = alloca i8**, align 8
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store i8** %p, i8*** %p.addr, align 8
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%tmp = load i8**, i8*** %p.addr, align 8
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%tmp1 = load i8*, i8** %tmp, align 8
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%tmp2 = bitcast i8* %tmp1 to void (...)*
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ret void (...)* %tmp2
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}
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define dso_local void @top() {
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entry:
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; CHECK: {{.*}} = {{.*}} call {{.*}} @ext
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; CHECK-NOT: {{.*}} = {{.*}} call {{.*}} @third
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; CHECK-NOT: {{.*}} = {{.*}} call {{.*}} @second
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; CHECK-NOT: {{.*}} = {{.*}} call {{.*}} @wrapper
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%q = alloca i8*, align 8
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store i8* bitcast (void ()* @third to i8*), i8** %q, align 8
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%tmp = call void (...)* @second(i8** %q)
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; The call to 'wrapper' here is to ensure that its function attributes
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; i.e., returning its parameter and having no side effect, will be decuded
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; before the next round of inlining happens to 'top' to expose the bug.
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%call = call void (...)* @wrapper(void (...)* %tmp)
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; The indirect call here is to confuse the alias analyzer so that
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; an incomplete graph will be built during the first round of inlining.
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; This allows the current function to be processed before the actual
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; callee, i.e., the function 'run', is processed. Once it's simplified to
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; a direct call, it also enables an additional round of inlining with all
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; function attributes deduced.
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call void (...) %call()
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ret void
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}
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define dso_local void (...)* @gen() {
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entry:
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%call = call void (...)* (...) @ext()
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ret void (...)* %call
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}
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declare dso_local void (...)* @ext(...)
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define dso_local void (...)* @wrapper(void (...)* %fn) {
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entry:
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ret void (...)* %fn
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}
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define dso_local void @run(void (...)* %fn) {
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entry:
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%fn.addr = alloca void (...)*, align 8
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%f = alloca void (...)*, align 8
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store void (...)* %fn, void (...)** %fn.addr, align 8
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%tmp = load void (...)*, void (...)** %fn.addr, align 8
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%call = call void (...)* @wrapper(void (...)* %tmp)
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store void (...)* %call, void (...)** %f, align 8
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%tmp1 = load void (...)*, void (...)** %f, align 8
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call void (...) %tmp1()
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ret void
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}
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define dso_local void @third() {
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entry:
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%f = alloca void (...)*, align 8
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%call = call void (...)* @gen()
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store void (...)* %call, void (...)** %f, align 8
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%tmp = load void (...)*, void (...)** %f, align 8
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call void @run(void (...)* %tmp)
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ret void
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} |