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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
;
; Check that SimplifyLibCalls do not (crash or) emit a library call if user
; has made a function alias with the same name.
%struct._IO_FILE = type { i32, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, ptr, i32, i32, i64, i16, i8, [1 x i8], ptr, i64, ptr, ptr, ptr, ptr, i64, i32, [20 x i8] }
%struct._IO_marker = type { ptr, ptr, i32 }
@stderr = external global ptr, align 8
@.str = private constant [8 x i8] c"crash!\0A\00", align 1
@fwrite = alias i64 (ptr, i64, i64, ptr), ptr @__fwrite_alias
define i64 @__fwrite_alias(ptr %ptr, i64 %size, i64 %n, ptr %s) {
; CHECK-LABEL: @__fwrite_alias(
; CHECK-NEXT: entry:
; CHECK-NEXT: ret i64 0
;
entry:
%ptr.addr = alloca ptr, align 8
%size.addr = alloca i64, align 8
%n.addr = alloca i64, align 8
%s.addr = alloca ptr, align 8
store ptr %ptr, ptr %ptr.addr, align 8
store i64 %size, ptr %size.addr, align 8
store i64 %n, ptr %n.addr, align 8
store ptr %s, ptr %s.addr, align 8
ret i64 0
}
define void @foo() {
; CHECK-LABEL: @foo(
; CHECK-NOT: call i64 @fwrite(
; CHECK: call {{.*}} @fprintf(
;
entry:
%retval = alloca i32, align 4
store i32 0, ptr %retval, align 4
%0 = load ptr, ptr @stderr, align 8
%call = call i32 (ptr, ptr, ...) @fprintf(ptr %0, ptr @.str)
ret void
}
declare i32 @fprintf(ptr, ptr, ...)
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