fold-weak.ll
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; RUN: opt -S -mergefunc < %s | FileCheck %s
define weak i32 @sum(i32 %x, i32 %y) {
%sum = add i32 %x, %y
%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
%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
}