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1; RUN: opt -S -passes=mergefunc < %s | FileCheck %s2 3define weak i32 @sum(i32 %x, i32 %y) {4 %sum = add i32 %x, %y5 %sum2 = add i32 %sum, %y6 %sum3 = add i32 %sum2, %y7 ret i32 %sum38}9 10define weak i32 @add(i32 %x, i32 %y) {11 %sum = add i32 %x, %y12 %sum2 = add i32 %sum, %y13 %sum3 = add i32 %sum2, %y14 ret i32 %sum315}16 17; Don't replace a weak function use by another equivalent function. We don't18; know whether the symbol that will ulitmately be linked is equivalent - we19; don't know that the weak definition is the definitive definition or whether it20; will be overriden by a stronger definition).21 22; CHECK-LABEL: define private i32 @023; CHECK: add i3224; CHECK: add i3225; CHECK: add i3226; CHECK: ret27 28; CHECK-LABEL: define i32 @use_weak29; CHECK: call i32 @add30; CHECK: call i32 @sum31; CHECK: ret32 33; CHECK-LABEL: define weak i32 @sum34; CHECK: tail call i32 @035; CHECK: ret36 37; CHECK-LABEL: define weak i32 @add38; CHECK: tail call i32 @039; CHECK: ret40 41 42define i32 @use_weak(i32 %a, i32 %b) {43 %res = call i32 @add(i32 %a, i32 %b)44 %res2 = call i32 @sum(i32 %a, i32 %b)45 %res3 = add i32 %res, %res246 ret i32 %res347}48