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