forked from OSchip/llvm-project
50 lines
1.3 KiB
LLVM
50 lines
1.3 KiB
LLVM
; RUN: opt -ipconstprop -S < %s | FileCheck %s
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;
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; #include <pthread.h>
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;
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; void *GlobalVPtr;
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;
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; static void *foo(void *arg) { return arg; }
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; static void *bar(void *arg) { return arg; }
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;
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; int main() {
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; pthread_t thread;
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; pthread_create(&thread, NULL, foo, NULL);
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; pthread_create(&thread, NULL, bar, &GlobalVPtr);
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; return 0;
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; }
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;
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; Verify the constant values NULL and &GlobalVPtr are propagated into foo and
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; bar, respectively.
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;
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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%union.pthread_attr_t = type { i64, [48 x i8] }
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@GlobalVPtr = common dso_local global i8* null, align 8
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define dso_local i32 @main() {
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entry:
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%thread = alloca i64, align 8
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%call = call i32 @pthread_create(i64* nonnull %thread, %union.pthread_attr_t* null, i8* (i8*)* nonnull @foo, i8* null)
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%call1 = call i32 @pthread_create(i64* nonnull %thread, %union.pthread_attr_t* null, i8* (i8*)* nonnull @bar, i8* bitcast (i8** @GlobalVPtr to i8*))
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ret i32 0
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}
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declare !callback !0 dso_local i32 @pthread_create(i64*, %union.pthread_attr_t*, i8* (i8*)*, i8*)
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define internal i8* @foo(i8* %arg) {
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entry:
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; CHECK: ret i8* null
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ret i8* %arg
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}
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define internal i8* @bar(i8* %arg) {
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entry:
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; CHECK: ret i8* bitcast (i8** @GlobalVPtr to i8*)
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ret i8* %arg
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}
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!1 = !{i64 2, i64 3, i1 false}
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!0 = !{!1}
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