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[Attributor][Fix] Use right type to replace expressions

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Summary: This should be obsolete once the functionality in D66967 is integrated.

Reviewers: uenoku, sstefan1

Subscribers: hiraditya, bollu, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D67231

llvm-svn: 371915
This commit is contained in:
Johannes Doerfert 2019-09-14 02:57:50 +00:00
parent 83bc3d5d9f
commit 2bbea6b20f
2 changed files with 19 additions and 3 deletions
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11
lib/Transforms/IPO/Attributor.cpp
View File

@ -874,12 +874,17 @@ ChangeStatus AAReturnedValuesImpl::manifest(Attributor &A) {
if (Function *F = dyn_cast<Function>(&AnchorValue)) {
for (const Use &U : F->uses())
if (CallBase *CB = dyn_cast<CallBase>(U.getUser()))
if (CB->isCallee(&U))
Changed = ReplaceCallSiteUsersWith(*CB, *RVC) | Changed;
if (CB->isCallee(&U)) {
Constant *RVCCast =
ConstantExpr::getTruncOrBitCast(RVC, CB->getType());
Changed = ReplaceCallSiteUsersWith(*CB, *RVCCast) | Changed;
}
} else {
assert(isa<CallBase>(AnchorValue) &&
"Expcected a function or call base anchor!");
Changed = ReplaceCallSiteUsersWith(cast<CallBase>(AnchorValue), *RVC);
Constant *RVCCast =
ConstantExpr::getTruncOrBitCast(RVC, AnchorValue.getType());
Changed = ReplaceCallSiteUsersWith(cast<CallBase>(AnchorValue), *RVCCast);
}
if (Changed == ChangeStatus::CHANGED)
STATS_DECLTRACK(UniqueConstantReturnValue, FunctionReturn,

11
test/Transforms/FunctionAttrs/arg_returned.ll
View File

@ -827,6 +827,17 @@ define i32 @exact(i32* %a) {
ret i32 %add3
}
@G = external global i8
define i32* @ret_const() #0 {
%bc = bitcast i8* @G to i32*
ret i32* %bc
}
define i32* @use_const() #0 {
%c = call i32* @ret_const()
; CHECK: ret i32* bitcast (i8* @G to i32*)
ret i32* %c
}
attributes #0 = { noinline nounwind uwtable }
; BOTH-NOT: attributes #