[cfe-commits] r147655 - in /cfe/trunk: lib/CodeGen/CGBuiltin.cpp test/CodeGen/no-builtin.c
David Chisnall
csdavec at swan.ac.uk
Fri Jan 6 04:20:19 PST 2012
Author: theraven
Date: Fri Jan 6 06:20:19 2012
New Revision: 147655
URL: http://llvm.org/viewvc/llvm-project?rev=147655&view=rev
Log:
If we are compiling with -fno-builtin then don't do constant folding of
builtins.
This fixes PR11711.
Added:
cfe/trunk/test/CodeGen/no-builtin.c
Modified:
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=147655&r1=147654&r2=147655&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Fri Jan 6 06:20:19 2012
@@ -175,7 +175,8 @@
unsigned BuiltinID, const CallExpr *E) {
// See if we can constant fold this builtin. If so, don't emit it at all.
Expr::EvalResult Result;
- if (E->EvaluateAsRValue(Result, CGM.getContext()) &&
+ if (!getContext().getLangOptions().NoBuiltin &&
+ E->EvaluateAsRValue(Result, CGM.getContext()) &&
!Result.hasSideEffects()) {
if (Result.Val.isInt())
return RValue::get(llvm::ConstantInt::get(getLLVMContext(),
Added: cfe/trunk/test/CodeGen/no-builtin.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/no-builtin.c?rev=147655&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/no-builtin.c (added)
+++ cfe/trunk/test/CodeGen/no-builtin.c Fri Jan 6 06:20:19 2012
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -fno-builtin -emit-llvm %s -o - | FileCheck %s
+//
+// Check that -fno-builtin prevents us from constant-folding through builtins
+// (PR11711)
+
+double
+cos(double x)
+{
+ printf("ok\n");
+ exit(0);
+}
+
+int
+main(int argc, char *argv[])
+{
+ cos(1); // CHECK: cos
+ printf("not ok\n");
+ abort();
+}
+
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