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Check to see if the 'no-builtin' attribute is set before simplifying a library call.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175470 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2013-02-18 23:17:16 +00:00
parent 5b0a8d9ca6
commit 2af5035a1d
2 changed files with 26 additions and 0 deletions
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3
lib/Transforms/Utils/SimplifyLibCalls.cpp
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@ -1889,6 +1889,9 @@ LibCallSimplifier::~LibCallSimplifier() {
}
Value *LibCallSimplifier::optimizeCall(CallInst *CI) {
Function *F = CI->getParent()->getParent();
// We don't want to "optimize" if the function doesn't want builtins.
if (F->hasFnAttribute("no-builtin")) return 0;
return Impl->optimizeCall(CI);
}

23
test/Transforms/InstCombine/no-builtin.ll Normal file
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@ -0,0 +1,23 @@
; RUN: opt < %s -instcombine -S | FileCheck %s
@.str = private unnamed_addr constant [14 x i8] c"hello world!\0A\00", align 1
; CHECK: @foo
; CHECK: printf
define void @foo() nounwind ssp uwtable "no-builtin" {
entry:
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0))
ret void
}
; CHECK: @bar
; CHECK: puts
define void @bar() nounwind ssp uwtable {
entry:
%call = call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([14 x i8]* @.str, i32 0, i32 0))
ret void
}
declare i32 @printf(i8*, ...)
attributes #0 = { nounwind ssp uwtable "no-builtin" }
attributes #1 = { nounwind ssp uwtable }