test/Transforms/InstCombine/weak-symbols.ll

; PR4738 - Test that the library call simplifier doesn't assume anything about
; weak symbols.
;
; RUN: opt < %s -instcombine -S | FileCheck %s

@real_init = weak_odr constant [2 x i8] c"y\00"
@fake_init = weak constant [2 x i8] c"y\00"
@.str = private constant [2 x i8] c"y\00"

define i32 @foo() nounwind {
; CHECK: define i32 @foo
; CHECK: call i32 @strcmp
; CHECK: ret i32 %temp1

entry:
  %str1 = getelementptr inbounds [2 x i8]* @fake_init, i64 0, i64 0
  %str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
  %temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
  ret i32 %temp1
}

define i32 @bar() nounwind {
; CHECK: define i32 @bar
; CHECK: ret i32 0

entry:
  %str1 = getelementptr inbounds [2 x i8]* @real_init, i64 0, i64 0
  %str2 = getelementptr inbounds [2 x i8]* @.str, i64 0, i64 0
  %temp1 = call i32 @strcmp(i8* %str1, i8* %str2) nounwind readonly
  ret i32 %temp1
}

declare i32 @strcmp(i8*, i8*) nounwind readonly