[PATCH] D21611: Fix small structures calling convention issue for some big endian architectures
Strahinja Petrovic via cfe-commits
cfe-commits at lists.llvm.org
Fri Jun 24 05:19:43 PDT 2016
This revision was automatically updated to reflect the committed changes.
Closed by commit rL273665: This patch fixes problem with passing structures and unions (authored by spetrovic).
Changed prior to commit:
http://reviews.llvm.org/D21611?vs=61557&id=61777#toc
Repository:
rL LLVM
http://reviews.llvm.org/D21611
Files:
cfe/trunk/lib/CodeGen/TargetInfo.cpp
cfe/trunk/test/CodeGen/struct-union-BE.c
Index: cfe/trunk/test/CodeGen/struct-union-BE.c
===================================================================
--- cfe/trunk/test/CodeGen/struct-union-BE.c
+++ cfe/trunk/test/CodeGen/struct-union-BE.c
@@ -0,0 +1,48 @@
+// RUN: %clang -O2 -target mips-linux-gnu -EB -S -emit-llvm %s -o - | FileCheck %s -check-prefix=MIPS
+// RUN: %clang -O2 -target mips64-linux-gnu -EB -S -emit-llvm %s -o - | FileCheck %s -check-prefix=MIPS64
+// RUN: %clang -O2 -target armeb-linux-gnueabihf -march=armv7a -EB -S -emit-llvm %s -o - | FileCheck %s -check-prefix=ARM
+
+#include <stdarg.h>
+#include <stdlib.h>
+
+struct tiny {
+ char c;
+};
+
+union data {
+ char c;
+};
+
+void fstr(int n, ...) {
+ struct tiny x;
+ va_list ap;
+ va_start (ap,n);
+ x = va_arg (ap, struct tiny);
+ if (x.c != 10)
+ abort();
+ va_end (ap);
+// MIPS-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i32 3
+// MIPS64-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i64 7
+// ARM-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i32 3
+}
+
+void funi(int n, ...) {
+ union data x;
+ va_list ap;
+ va_start (ap,n);
+ x = va_arg (ap, union data);
+ if (x.c != 10)
+ abort();
+ va_end (ap);
+// MIPS-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i32 3
+// MIPS64-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i64 7
+// ARM-NOT: %{{[0-9]+}} = getelementptr inbounds i8, i8* %argp.cur, i32 3
+}
+
+void foo() {
+ struct tiny x[3];
+ union data y;
+ x[0].c = 10;
+ fstr(1, x[0]);
+ funi(1, y);
+}
Index: cfe/trunk/lib/CodeGen/TargetInfo.cpp
===================================================================
--- cfe/trunk/lib/CodeGen/TargetInfo.cpp
+++ cfe/trunk/lib/CodeGen/TargetInfo.cpp
@@ -272,7 +272,8 @@
// If the argument is smaller than a slot, and this is a big-endian
// target, the argument will be right-adjusted in its slot.
- if (DirectSize < SlotSize && CGF.CGM.getDataLayout().isBigEndian()) {
+ if (DirectSize < SlotSize && CGF.CGM.getDataLayout().isBigEndian() &&
+ !DirectTy->isStructTy()) {
Addr = CGF.Builder.CreateConstInBoundsByteGEP(Addr, SlotSize - DirectSize);
}
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