[cfe-commits] r151993 - in /cfe/trunk: lib/CodeGen/CGBuiltin.cpp test/CodeGen/builtin-memfns.c
Chris Lattner
sabre at nondot.org
Sat Mar 3 16:52:12 PST 2012
Author: lattner
Date: Sat Mar 3 18:52:12 2012
New Revision: 151993
URL: http://llvm.org/viewvc/llvm-project?rev=151993&view=rev
Log:
add a testcase for PR12094 and fix a crash on pointer to incomplete type,
reported by Richard Smith.
Modified:
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/test/CodeGen/builtin-memfns.c
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=151993&r1=151992&r2=151993&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Sat Mar 3 18:52:12 2012
@@ -1264,9 +1264,13 @@
// Check if the type is a pointer. The implicit cast operand might not be.
while (Addr->getType()->isPointerType()) {
QualType PtTy = Addr->getType()->getPointeeType();
- unsigned NewA = getContext().getTypeAlignInChars(PtTy).getQuantity();
- if (NewA > Align)
- Align = NewA;
+
+ // Can't get alignment of incomplete types.
+ if (!PtTy->isIncompleteType()) {
+ unsigned NewA = getContext().getTypeAlignInChars(PtTy).getQuantity();
+ if (NewA > Align)
+ Align = NewA;
+ }
// If the address is an implicit cast, repeat with the cast operand.
if (const ImplicitCastExpr *CastAddr = dyn_cast<ImplicitCastExpr>(Addr)) {
Modified: cfe/trunk/test/CodeGen/builtin-memfns.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtin-memfns.c?rev=151993&r1=151992&r2=151993&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/builtin-memfns.c (original)
+++ cfe/trunk/test/CodeGen/builtin-memfns.c Sat Mar 3 18:52:12 2012
@@ -48,3 +48,14 @@
int test6(char *X) {
return __builtin___memcpy_chk(X, X, 42, 42) != 0;
}
+
+// CHECK: @test7
+// PR12094
+int test7(int *p) {
+ // CHECK: call void @llvm.memset{{.*}}256, i32 4, i1 false)
+ __builtin_memset(p, 0, 256); // Should be alignment = 4
+ struct snd_pcm_hw_params_t* hwparams; // incomplete type.
+
+ __builtin_memset(hwparams, 0, 256); // No crash alignment = 1
+ // CHECK: call void @llvm.memset{{.*}}256, i32 1, i1 false)
+}
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