-; RUN: opt < %s -mergefunc -S > %t
-; RUN: grep "define weak" %t | count 2
-; RUN: grep "call" %t | count 2
-; XFAIL: *
-
-; This test is off for a bit as we change this particular sort of folding to
-; only apply on ELF systems and not Mach-O systems.
+; RUN: opt -S -mergefunc < %s | FileCheck %s
define weak i32 @sum(i32 %x, i32 %y) {
%sum = add i32 %x, %y
- ret i32 %sum
+ %sum2 = add i32 %sum, %y
+ %sum3 = add i32 %sum2, %y
+ ret i32 %sum3
}
define weak i32 @add(i32 %x, i32 %y) {
%sum = add i32 %x, %y
- ret i32 %sum
+ %sum2 = add i32 %sum, %y
+ %sum3 = add i32 %sum2, %y
+ ret i32 %sum3
+}
+
+; Don't replace a weak function use by another equivalent function. We don't
+; know whether the symbol that will ulitmately be linked is equivalent - we
+; don't know that the weak definition is the definitive definition or whether it
+; will be overriden by a stronger definition).
+
+; CHECK-LABEL: define private i32 @0
+; CHECK: add i32
+; CHECK: add i32
+; CHECK: add i32
+; CHECK: ret
+
+; CHECK-LABEL: define i32 @use_weak
+; CHECK: call i32 @add
+; CHECK: call i32 @sum
+; CHECK: ret
+
+; CHECK-LABEL: define weak i32 @sum
+; CHECK: tail call i32 @0
+; CHECK: ret
+
+; CHECK-LABEL: define weak i32 @add
+; CHECK: tail call i32 @0
+; CHECK: ret
+
+
+define i32 @use_weak(i32 %a, i32 %b) {
+ %res = call i32 @add(i32 %a, i32 %b)
+ %res2 = call i32 @sum(i32 %a, i32 %b)
+ %res3 = add i32 %res, %res2
+ ret i32 %res3
}