Vendor import of clang RELEASE_350/final tag r216957 (effectively, 3.5.0 release):

https://llvm.org/svn/llvm-project/cfe/tags/RELEASE_350/final@216957

1 files changed, 719 insertions, 0 deletions

diff --git a/test/CodeGen/arm64-arguments.c b/test/CodeGen/arm64-arguments.c
new file mode 100644
index 0000000..b2de08d
--- /dev/null
+++ b/test/CodeGen/arm64-arguments.c
@@ -0,0 +1,719 @@
+// RUN: %clang_cc1 -triple arm64-apple-ios7 -target-feature +neon -target-abi darwinpcs -ffreestanding -emit-llvm -w -o - %s | FileCheck %s
+
+// CHECK: define signext i8 @f0()
+char f0(void) {
+  return 0;
+}
+
+// Struct as return type. Aggregates <= 16 bytes are passed directly and round
+// up to multiple of 8 bytes.
+// CHECK: define i64 @f1()
+struct s1 { char f0; };
+struct s1 f1(void) {}
+
+// CHECK: define i64 @f2()
+struct s2 { short f0; };
+struct s2 f2(void) {}
+
+// CHECK: define i64 @f3()
+struct s3 { int f0; };
+struct s3 f3(void) {}
+
+// CHECK: define i64 @f4()
+struct s4 { struct s4_0 { int f0; } f0; };
+struct s4 f4(void) {}
+
+// CHECK: define i64 @f5()
+struct s5 { struct { } f0; int f1; };
+struct s5 f5(void) {}
+
+// CHECK: define i64 @f6()
+struct s6 { int f0[1]; };
+struct s6 f6(void) {}
+
+// CHECK: define void @f7()
+struct s7 { struct { int : 0; } f0; };
+struct s7 f7(void) {}
+
+// CHECK: define void @f8()
+struct s8 { struct { int : 0; } f0[1]; };
+struct s8 f8(void) {}
+
+// CHECK: define i64 @f9()
+struct s9 { int f0; int : 0; };
+struct s9 f9(void) {}
+
+// CHECK: define i64 @f10()
+struct s10 { int f0; int : 0; int : 0; };
+struct s10 f10(void) {}
+
+// CHECK: define i64 @f11()
+struct s11 { int : 0; int f0; };
+struct s11 f11(void) {}
+
+// CHECK: define i64 @f12()
+union u12 { char f0; short f1; int f2; };
+union u12 f12(void) {}
+
+// Homogeneous Aggregate as return type will be passed directly.
+// CHECK: define %struct.s13 @f13()
+struct s13 { float f0; };
+struct s13 f13(void) {}
+// CHECK: define %union.u14 @f14()
+union u14 { float f0; };
+union u14 f14(void) {}
+
+// CHECK: define void @f15()
+void f15(struct s7 a0) {}
+
+// CHECK: define void @f16()
+void f16(struct s8 a0) {}
+
+// CHECK: define i64 @f17()
+struct s17 { short f0 : 13; char f1 : 4; };
+struct s17 f17(void) {}
+
+// CHECK: define i64 @f18()
+struct s18 { short f0; char f1 : 4; };
+struct s18 f18(void) {}
+
+// CHECK: define i64 @f19()
+struct s19 { int f0; struct s8 f1; };
+struct s19 f19(void) {}
+
+// CHECK: define i64 @f20()
+struct s20 { struct s8 f1; int f0; };
+struct s20 f20(void) {}
+
+// CHECK: define i64 @f21()
+struct s21 { struct {} f1; int f0 : 4; };
+struct s21 f21(void) {}
+
+// CHECK: define i64 @f22()
+// CHECK: define i64 @f23()
+// CHECK: define i64 @f24()
+// CHECK: define i128 @f25()
+// CHECK: define { float, float } @f26()
+// CHECK: define { double, double } @f27()
+_Complex char       f22(void) {}
+_Complex short      f23(void) {}
+_Complex int        f24(void) {}
+_Complex long long  f25(void) {}
+_Complex float      f26(void) {}
+_Complex double     f27(void) {}
+
+// CHECK: define i64 @f28()
+struct s28 { _Complex char f0; };
+struct s28 f28() {}
+
+// CHECK: define i64 @f29()
+struct s29 { _Complex short f0; };
+struct s29 f29() {}
+
+// CHECK: define i64 @f30()
+struct s30 { _Complex int f0; };
+struct s30 f30() {}
+
+struct s31 { char x; };
+void f31(struct s31 s) { }
+// CHECK: define void @f31(i64 %s.coerce)
+// CHECK: %s = alloca %struct.s31, align 8
+// CHECK: trunc i64 %s.coerce to i8
+// CHECK: store i8 %{{.*}},
+
+struct s32 { double x; };
+void f32(struct s32 s) { }
+// Expand Homogeneous Aggregate.
+// CHECK: @f32(double %{{.*}})
+
+// A composite type larger than 16 bytes should be passed indirectly.
+struct s33 { char buf[32*32]; };
+void f33(struct s33 s) { }
+// CHECK: define void @f33(%struct.s33* %s)
+
+struct s34 { char c; };
+void f34(struct s34 s);
+void g34(struct s34 *s) { f34(*s); }
+// CHECK: @g34(%struct.s34* %s)
+// CHECK: %[[a:.*]] = load i8* %{{.*}}
+// CHECK: zext i8 %[[a]] to i64
+// CHECK: call void @f34(i64 %{{.*}})
+
+/*
+ * Check that va_arg accesses stack according to ABI alignment
+ */
+long long t1(int i, ...) {
+    // CHECK: t1
+    __builtin_va_list ap;
+    __builtin_va_start(ap, i);
+    // CHECK-NOT: add i32 %{{.*}} 7
+    // CHECK-NOT: and i32 %{{.*}} -8
+    long long ll = __builtin_va_arg(ap, long long);
+    __builtin_va_end(ap);
+    return ll;
+}
+double t2(int i, ...) {
+    // CHECK: t2
+    __builtin_va_list ap;
+    __builtin_va_start(ap, i);
+    // CHECK-NOT: add i32 %{{.*}} 7
+    // CHECK-NOT: and i32 %{{.*}} -8
+    double ll = __builtin_va_arg(ap, double);
+    __builtin_va_end(ap);
+    return ll;
+}
+
+#include <arm_neon.h>
+
+// Homogeneous Vector Aggregate as return type and argument type.
+// CHECK: define %struct.int8x16x2_t @f0_0(<16 x i8> %{{.*}}, <16 x i8> %{{.*}})
+int8x16x2_t f0_0(int8x16_t a0, int8x16_t a1) {
+  return vzipq_s8(a0, a1);
+}
+
+// Test direct vector passing.
+typedef float T_float32x2 __attribute__ ((__vector_size__ (8)));
+typedef float T_float32x4 __attribute__ ((__vector_size__ (16)));
+typedef float T_float32x8 __attribute__ ((__vector_size__ (32)));
+typedef float T_float32x16 __attribute__ ((__vector_size__ (64)));
+
+// CHECK: define <2 x float> @f1_0(<2 x float> %{{.*}})
+T_float32x2 f1_0(T_float32x2 a0) { return a0; }
+// CHECK: define <4 x float> @f1_1(<4 x float> %{{.*}})
+T_float32x4 f1_1(T_float32x4 a0) { return a0; }
+// Vector with length bigger than 16-byte is illegal and is passed indirectly.
+// CHECK: define void @f1_2(<8 x float>* noalias sret  %{{.*}}, <8 x float>*)
+T_float32x8 f1_2(T_float32x8 a0) { return a0; }
+// CHECK: define void @f1_3(<16 x float>* noalias sret %{{.*}}, <16 x float>*)
+T_float32x16 f1_3(T_float32x16 a0) { return a0; }
+
+// Testing alignment with aggregates: HFA, aggregates with size <= 16 bytes and
+// aggregates with size > 16 bytes.
+struct s35
+{
+   float v[4]; //Testing HFA.
+} __attribute__((aligned(16)));
+typedef struct s35 s35_with_align;
+
+typedef __attribute__((neon_vector_type(4))) float float32x4_t;
+float32x4_t f35(int i, s35_with_align s1, s35_with_align s2) {
+// CHECK: define <4 x float> @f35(i32 %i, float %s1.0, float %s1.1, float %s1.2, float %s1.3, float %s2.0, float %s2.1, float %s2.2, float %s2.3)
+// CHECK: %s1 = alloca %struct.s35, align 16
+// CHECK: %s2 = alloca %struct.s35, align 16
+// CHECK: %[[a:.*]] = bitcast %struct.s35* %s1 to <4 x float>*
+// CHECK: load <4 x float>* %[[a]], align 16
+// CHECK: %[[b:.*]] = bitcast %struct.s35* %s2 to <4 x float>*
+// CHECK: load <4 x float>* %[[b]], align 16
+  float32x4_t v = vaddq_f32(*(float32x4_t *)&s1,
+                            *(float32x4_t *)&s2);
+  return v;
+}
+
+struct s36
+{
+   int v[4]; //Testing 16-byte aggregate.
+} __attribute__((aligned(16)));
+typedef struct s36 s36_with_align;
+
+typedef __attribute__((neon_vector_type(4))) int int32x4_t;
+int32x4_t f36(int i, s36_with_align s1, s36_with_align s2) {
+// CHECK: define <4 x i32> @f36(i32 %i, i128 %s1.coerce, i128 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s36, align 16
+// CHECK: %s2 = alloca %struct.s36, align 16
+// CHECK: store i128 %s1.coerce, i128* %{{.*}}, align 1
+// CHECK: store i128 %s2.coerce, i128* %{{.*}}, align 1
+// CHECK: %[[a:.*]] = bitcast %struct.s36* %s1 to <4 x i32>*
+// CHECK: load <4 x i32>* %[[a]], align 16
+// CHECK: %[[b:.*]] = bitcast %struct.s36* %s2 to <4 x i32>*
+// CHECK: load <4 x i32>* %[[b]], align 16
+  int32x4_t v = vaddq_s32(*(int32x4_t *)&s1,
+                          *(int32x4_t *)&s2);
+  return v;
+}
+
+struct s37
+{
+   int v[18]; //Testing large aggregate.
+} __attribute__((aligned(16)));
+typedef struct s37 s37_with_align;
+
+int32x4_t f37(int i, s37_with_align s1, s37_with_align s2) {
+// CHECK: define <4 x i32> @f37(i32 %i, %struct.s37* %s1, %struct.s37* %s2)
+// CHECK: %[[a:.*]] = bitcast %struct.s37* %s1 to <4 x i32>*
+// CHECK: load <4 x i32>* %[[a]], align 16
+// CHECK: %[[b:.*]] = bitcast %struct.s37* %s2 to <4 x i32>*
+// CHECK: load <4 x i32>* %[[b]], align 16
+  int32x4_t v = vaddq_s32(*(int32x4_t *)&s1,
+                          *(int32x4_t *)&s2);
+  return v;
+}
+s37_with_align g37;
+int32x4_t caller37() {
+// CHECK: caller37
+// CHECK: %[[a:.*]] = alloca %struct.s37, align 16
+// CHECK: %[[b:.*]] = alloca %struct.s37, align 16
+// CHECK: call void @llvm.memcpy
+// CHECK: call void @llvm.memcpy
+// CHECK: call <4 x i32> @f37(i32 3, %struct.s37* %[[a]], %struct.s37* %[[b]])
+  return f37(3, g37, g37);
+}
+
+// rdar://problem/12648441
+// Test passing structs with size < 8, < 16 and > 16
+// with alignment of 16 and without
+
+// structs with size <= 8 bytes, without alignment attribute
+// passed as i64 regardless of the align attribute
+struct s38
+{
+  int i;
+  short s;
+};
+typedef struct s38 s38_no_align;
+// passing structs in registers
+__attribute__ ((noinline))
+int f38(int i, s38_no_align s1, s38_no_align s2) {
+// CHECK: define i32 @f38(i32 %i, i64 %s1.coerce, i64 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s38, align 8
+// CHECK: %s2 = alloca %struct.s38, align 8
+// CHECK: store i64 %s1.coerce, i64* %{{.*}}, align 1
+// CHECK: store i64 %s2.coerce, i64* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s38* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s38* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s38* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s38* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s38_no_align g38;
+s38_no_align g38_2;
+int caller38() {
+// CHECK: define i32 @caller38()
+// CHECK: %[[a:.*]] = load i64* bitcast (%struct.s38* @g38 to i64*), align 1
+// CHECK: %[[b:.*]] = load i64* bitcast (%struct.s38* @g38_2 to i64*), align 1
+// CHECK: call i32 @f38(i32 3, i64 %[[a]], i64 %[[b]])
+  return f38(3, g38, g38_2);
+}
+// passing structs on stack
+__attribute__ ((noinline))
+int f38_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s38_no_align s1, s38_no_align s2) {
+// CHECK: define i32 @f38_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i64 %s1.coerce, i64 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s38, align 8
+// CHECK: %s2 = alloca %struct.s38, align 8
+// CHECK: store i64 %s1.coerce, i64* %{{.*}}, align 1
+// CHECK: store i64 %s2.coerce, i64* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s38* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s38* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s38* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s38* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller38_stack() {
+// CHECK: define i32 @caller38_stack()
+// CHECK: %[[a:.*]] = load i64* bitcast (%struct.s38* @g38 to i64*), align 1
+// CHECK: %[[b:.*]] = load i64* bitcast (%struct.s38* @g38_2 to i64*), align 1
+// CHECK: call i32 @f38_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i64 %[[a]], i64 %[[b]])
+  return f38_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g38, g38_2);
+}
+
+// structs with size <= 8 bytes, with alignment attribute
+struct s39
+{
+  int i;
+  short s;
+} __attribute__((aligned(16)));
+typedef struct s39 s39_with_align;
+// passing aligned structs in registers
+__attribute__ ((noinline))
+int f39(int i, s39_with_align s1, s39_with_align s2) {
+// CHECK: define i32 @f39(i32 %i, i128 %s1.coerce, i128 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s39, align 16
+// CHECK: %s2 = alloca %struct.s39, align 16
+// CHECK: store i128 %s1.coerce, i128* %{{.*}}, align 1
+// CHECK: store i128 %s2.coerce, i128* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s39* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s39* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s39* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s39* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s39_with_align g39;
+s39_with_align g39_2;
+int caller39() {
+// CHECK: define i32 @caller39()
+// CHECK: %[[a:.*]] = load i128* bitcast (%struct.s39* @g39 to i128*), align 1
+// CHECK: %[[b:.*]] = load i128* bitcast (%struct.s39* @g39_2 to i128*), align 1
+// CHECK: call i32 @f39(i32 3, i128 %[[a]], i128 %[[b]])
+  return f39(3, g39, g39_2);
+}
+// passing aligned structs on stack
+__attribute__ ((noinline))
+int f39_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s39_with_align s1, s39_with_align s2) {
+// CHECK: define i32 @f39_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i128 %s1.coerce, i128 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s39, align 16
+// CHECK: %s2 = alloca %struct.s39, align 16
+// CHECK: store i128 %s1.coerce, i128* %{{.*}}, align 1
+// CHECK: store i128 %s2.coerce, i128* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s39* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s39* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s39* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s39* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller39_stack() {
+// CHECK: define i32 @caller39_stack()
+// CHECK: %[[a:.*]] = load i128* bitcast (%struct.s39* @g39 to i128*), align 1
+// CHECK: %[[b:.*]] = load i128* bitcast (%struct.s39* @g39_2 to i128*), align 1
+// CHECK: call i32 @f39_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i128 %[[a]], i128 %[[b]])
+  return f39_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g39, g39_2);
+}
+
+// structs with size <= 16 bytes, without alignment attribute
+struct s40
+{
+  int i;
+  short s;
+  int i2;
+  short s2;
+};
+typedef struct s40 s40_no_align;
+// passing structs in registers
+__attribute__ ((noinline))
+int f40(int i, s40_no_align s1, s40_no_align s2) {
+// CHECK: define i32 @f40(i32 %i, [2 x i64] %s1.coerce, [2 x i64] %s2.coerce)
+// CHECK: %s1 = alloca %struct.s40, align 8
+// CHECK: %s2 = alloca %struct.s40, align 8
+// CHECK: store [2 x i64] %s1.coerce, [2 x i64]* %{{.*}}, align 1
+// CHECK: store [2 x i64] %s2.coerce, [2 x i64]* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s40* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s40* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s40* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s40* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s40_no_align g40;
+s40_no_align g40_2;
+int caller40() {
+// CHECK: define i32 @caller40()
+// CHECK: %[[a:.*]] = load [2 x i64]* bitcast (%struct.s40* @g40 to [2 x i64]*), align 1
+// CHECK: %[[b:.*]] = load [2 x i64]* bitcast (%struct.s40* @g40_2 to [2 x i64]*), align 1
+// CHECK: call i32 @f40(i32 3, [2 x i64] %[[a]], [2 x i64] %[[b]])
+  return f40(3, g40, g40_2);
+}
+// passing structs on stack
+__attribute__ ((noinline))
+int f40_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s40_no_align s1, s40_no_align s2) {
+// CHECK: define i32 @f40_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, [2 x i64] %s1.coerce, [2 x i64] %s2.coerce)
+// CHECK: %s1 = alloca %struct.s40, align 8
+// CHECK: %s2 = alloca %struct.s40, align 8
+// CHECK: store [2 x i64] %s1.coerce, [2 x i64]* %{{.*}}, align 1
+// CHECK: store [2 x i64] %s2.coerce, [2 x i64]* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s40* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s40* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s40* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s40* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller40_stack() {
+// CHECK: define i32 @caller40_stack()
+// CHECK: %[[a:.*]] = load [2 x i64]* bitcast (%struct.s40* @g40 to [2 x i64]*), align 1
+// CHECK: %[[b:.*]] = load [2 x i64]* bitcast (%struct.s40* @g40_2 to [2 x i64]*), align 1
+// CHECK: call i32 @f40_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, [2 x i64] %[[a]], [2 x i64] %[[b]])
+  return f40_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g40, g40_2);
+}
+
+// structs with size <= 16 bytes, with alignment attribute
+struct s41
+{
+  int i;
+  short s;
+  int i2;
+  short s2;
+} __attribute__((aligned(16)));
+typedef struct s41 s41_with_align;
+// passing aligned structs in registers
+__attribute__ ((noinline))
+int f41(int i, s41_with_align s1, s41_with_align s2) {
+// CHECK: define i32 @f41(i32 %i, i128 %s1.coerce, i128 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s41, align 16
+// CHECK: %s2 = alloca %struct.s41, align 16
+// CHECK: store i128 %s1.coerce, i128* %{{.*}}, align 1
+// CHECK: store i128 %s2.coerce, i128* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s41* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s41* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s41* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s41* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s41_with_align g41;
+s41_with_align g41_2;
+int caller41() {
+// CHECK: define i32 @caller41()
+// CHECK: %[[a:.*]] = load i128* bitcast (%struct.s41* @g41 to i128*), align 1
+// CHECK: %[[b:.*]] = load i128* bitcast (%struct.s41* @g41_2 to i128*), align 1
+// CHECK: call i32 @f41(i32 3, i128 %[[a]], i128 %[[b]])
+  return f41(3, g41, g41_2);
+}
+// passing aligned structs on stack
+__attribute__ ((noinline))
+int f41_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s41_with_align s1, s41_with_align s2) {
+// CHECK: define i32 @f41_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, i128 %s1.coerce, i128 %s2.coerce)
+// CHECK: %s1 = alloca %struct.s41, align 16
+// CHECK: %s2 = alloca %struct.s41, align 16
+// CHECK: store i128 %s1.coerce, i128* %{{.*}}, align 1
+// CHECK: store i128 %s2.coerce, i128* %{{.*}}, align 1
+// CHECK: getelementptr inbounds %struct.s41* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s41* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s41* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s41* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller41_stack() {
+// CHECK: define i32 @caller41_stack()
+// CHECK: %[[a:.*]] = load i128* bitcast (%struct.s41* @g41 to i128*), align 1
+// CHECK: %[[b:.*]] = load i128* bitcast (%struct.s41* @g41_2 to i128*), align 1
+// CHECK: call i32 @f41_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i128 %[[a]], i128 %[[b]])
+  return f41_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g41, g41_2);
+}
+
+// structs with size > 16 bytes, without alignment attribute
+struct s42
+{
+  int i;
+  short s;
+  int i2;
+  short s2;
+  int i3;
+  short s3;
+};
+typedef struct s42 s42_no_align;
+// passing structs in registers
+__attribute__ ((noinline))
+int f42(int i, s42_no_align s1, s42_no_align s2) {
+// CHECK: define i32 @f42(i32 %i, %struct.s42* %s1, %struct.s42* %s2)
+// CHECK: getelementptr inbounds %struct.s42* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s42* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s42* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s42* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s42_no_align g42;
+s42_no_align g42_2;
+int caller42() {
+// CHECK: define i32 @caller42()
+// CHECK: %[[a:.*]] = alloca %struct.s42, align 4
+// CHECK: %[[b:.*]] = alloca %struct.s42, align 4
+// CHECK: %[[c:.*]] = bitcast %struct.s42* %[[a]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: %[[d:.*]] = bitcast %struct.s42* %[[b]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: call i32 @f42(i32 3, %struct.s42* %[[a]], %struct.s42* %[[b]])
+  return f42(3, g42, g42_2);
+}
+// passing structs on stack
+__attribute__ ((noinline))
+int f42_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s42_no_align s1, s42_no_align s2) {
+// CHECK: define i32 @f42_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, %struct.s42* %s1, %struct.s42* %s2)
+// CHECK: getelementptr inbounds %struct.s42* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s42* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s42* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s42* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller42_stack() {
+// CHECK: define i32 @caller42_stack()
+// CHECK: %[[a:.*]] = alloca %struct.s42, align 4
+// CHECK: %[[b:.*]] = alloca %struct.s42, align 4
+// CHECK: %[[c:.*]] = bitcast %struct.s42* %[[a]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: %[[d:.*]] = bitcast %struct.s42* %[[b]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: call i32 @f42_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, %struct.s42* %[[a]], %struct.s42* %[[b]])
+  return f42_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g42, g42_2);
+}
+
+// structs with size > 16 bytes, with alignment attribute
+struct s43
+{
+  int i;
+  short s;
+  int i2;
+  short s2;
+  int i3;
+  short s3;
+} __attribute__((aligned(16)));
+typedef struct s43 s43_with_align;
+// passing aligned structs in registers
+__attribute__ ((noinline))
+int f43(int i, s43_with_align s1, s43_with_align s2) {
+// CHECK: define i32 @f43(i32 %i, %struct.s43* %s1, %struct.s43* %s2)
+// CHECK: getelementptr inbounds %struct.s43* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s43* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s43* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s43* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + s1.s + s2.s;
+}
+s43_with_align g43;
+s43_with_align g43_2;
+int caller43() {
+// CHECK: define i32 @caller43()
+// CHECK: %[[a:.*]] = alloca %struct.s43, align 16
+// CHECK: %[[b:.*]] = alloca %struct.s43, align 16
+// CHECK: %[[c:.*]] = bitcast %struct.s43* %[[a]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: %[[d:.*]] = bitcast %struct.s43* %[[b]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: call i32 @f43(i32 3, %struct.s43* %[[a]], %struct.s43* %[[b]])
+  return f43(3, g43, g43_2);
+}
+// passing aligned structs on stack
+__attribute__ ((noinline))
+int f43_stack(int i, int i2, int i3, int i4, int i5, int i6, int i7, int i8,
+              int i9, s43_with_align s1, s43_with_align s2) {
+// CHECK: define i32 @f43_stack(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, i32 %i8, i32 %i9, %struct.s43* %s1, %struct.s43* %s2)
+// CHECK: getelementptr inbounds %struct.s43* %s1, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s43* %s2, i32 0, i32 0
+// CHECK: getelementptr inbounds %struct.s43* %s1, i32 0, i32 1
+// CHECK: getelementptr inbounds %struct.s43* %s2, i32 0, i32 1
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + i8 + i9 + s1.s + s2.s;
+}
+int caller43_stack() {
+// CHECK: define i32 @caller43_stack()
+// CHECK: %[[a:.*]] = alloca %struct.s43, align 16
+// CHECK: %[[b:.*]] = alloca %struct.s43, align 16
+// CHECK: %[[c:.*]] = bitcast %struct.s43* %[[a]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: %[[d:.*]] = bitcast %struct.s43* %[[b]] to i8*
+// CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+// CHECK: call i32 @f43_stack(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, %struct.s43* %[[a]], %struct.s43* %[[b]])
+  return f43_stack(1, 2, 3, 4, 5, 6, 7, 8, 9, g43, g43_2);
+}
+
+// rdar://13668927
+// We should not split argument s1 between registers and stack.
+__attribute__ ((noinline))
+int f40_split(int i, int i2, int i3, int i4, int i5, int i6, int i7,
+              s40_no_align s1, s40_no_align s2) {
+// CHECK: define i32 @f40_split(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, [1 x i32], [2 x i64] %s1.coerce, [2 x i64] %s2.coerce)
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + s1.s + s2.s;
+}
+int caller40_split() {
+// CHECK: define i32 @caller40_split()
+// CHECK: call i32 @f40_split(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, [1 x i32] undef, [2 x i64] %{{.*}} [2 x i64] %{{.*}})
+  return f40_split(1, 2, 3, 4, 5, 6, 7, g40, g40_2);
+}
+
+__attribute__ ((noinline))
+int f41_split(int i, int i2, int i3, int i4, int i5, int i6, int i7,
+              s41_with_align s1, s41_with_align s2) {
+// CHECK: define i32 @f41_split(i32 %i, i32 %i2, i32 %i3, i32 %i4, i32 %i5, i32 %i6, i32 %i7, [1 x i32], i128 %s1.coerce, i128 %s2.coerce)
+  return s1.i + s2.i + i + i2 + i3 + i4 + i5 + i6 + i7 + s1.s + s2.s;
+}
+int caller41_split() {
+// CHECK: define i32 @caller41_split()
+// CHECK: call i32 @f41_split(i32 1, i32 2, i32 3, i32 4, i32 5, i32 6, i32 7, [1 x i32] undef, i128 %{{.*}}, i128 %{{.*}})
+  return f41_split(1, 2, 3, 4, 5, 6, 7, g41, g41_2);
+}
+
+// Handle homogeneous aggregates properly in variadic functions.
+struct HFA {
+  float a, b, c, d;
+};
+
+float test_hfa(int n, ...) {
+// CHECK-LABEL: define float @test_hfa(i32 %n, ...)
+// CHECK: [[THELIST:%.*]] = alloca i8*
+// CHECK: [[CURLIST:%.*]] = load i8** [[THELIST]]
+
+  // HFA is not indirect, so occupies its full 16 bytes on the stack.
+// CHECK: [[NEXTLIST:%.*]] = getelementptr i8* [[CURLIST]], i32 16
+// CHECK: store i8* [[NEXTLIST]], i8** [[THELIST]]
+
+// CHECK: bitcast i8* [[CURLIST]] to %struct.HFA*
+  __builtin_va_list thelist;
+  __builtin_va_start(thelist, n);
+  struct HFA h = __builtin_va_arg(thelist, struct HFA);
+  return h.d;
+}
+
+float test_hfa_call(struct HFA *a) {
+// CHECK-LABEL: define float @test_hfa_call(%struct.HFA* %a)
+// CHECK: call float (i32, ...)* @test_hfa(i32 1, [2 x double] {{.*}})
+  test_hfa(1, *a);
+}
+
+struct TooBigHFA {
+  float a, b, c, d, e;
+};
+
+float test_toobig_hfa(int n, ...) {
+// CHECK-LABEL: define float @test_toobig_hfa(i32 %n, ...)
+// CHECK: [[THELIST:%.*]] = alloca i8*
+// CHECK: [[CURLIST:%.*]] = load i8** [[THELIST]]
+
+  // TooBigHFA is not actually an HFA, so gets passed indirectly. Only 8 bytes
+  // of stack consumed.
+// CHECK: [[NEXTLIST:%.*]] = getelementptr i8* [[CURLIST]], i32 8
+// CHECK: store i8* [[NEXTLIST]], i8** [[THELIST]]
+
+// CHECK: [[HFAPTRPTR:%.*]] = bitcast i8* [[CURLIST]] to i8**
+// CHECK: [[HFAPTR:%.*]] = load i8** [[HFAPTRPTR]]
+// CHECK: bitcast i8* [[HFAPTR]] to %struct.TooBigHFA*
+  __builtin_va_list thelist;
+  __builtin_va_start(thelist, n);
+  struct TooBigHFA h = __builtin_va_arg(thelist, struct TooBigHFA);
+  return h.d;
+}
+
+struct HVA {
+  int32x4_t a, b;
+};
+
+int32x4_t test_hva(int n, ...) {
+// CHECK-LABEL: define <4 x i32> @test_hva(i32 %n, ...)
+// CHECK: [[THELIST:%.*]] = alloca i8*
+// CHECK: [[CURLIST:%.*]] = load i8** [[THELIST]]
+
+  // HVA is not indirect, so occupies its full 16 bytes on the stack. but it
+  // must be properly aligned.
+// CHECK: [[ALIGN0:%.*]] = getelementptr i8* [[CURLIST]], i32 15
+// CHECK: [[ALIGN1:%.*]] = ptrtoint i8* [[ALIGN0]] to i64
+// CHECK: [[ALIGN2:%.*]] = and i64 [[ALIGN1]], -16
+// CHECK: [[ALIGNED_LIST:%.*]] = inttoptr i64 [[ALIGN2]] to i8*
+
+// CHECK: [[NEXTLIST:%.*]] = getelementptr i8* [[ALIGNED_LIST]], i32 32
+// CHECK: store i8* [[NEXTLIST]], i8** [[THELIST]]
+
+// CHECK: bitcast i8* [[ALIGNED_LIST]] to %struct.HVA*
+  __builtin_va_list thelist;
+  __builtin_va_start(thelist, n);
+  struct HVA h = __builtin_va_arg(thelist, struct HVA);
+  return h.b;
+}
+
+struct TooBigHVA {
+  int32x4_t a, b, c, d, e;
+};
+
+int32x4_t test_toobig_hva(int n, ...) {
+// CHECK-LABEL: define <4 x i32> @test_toobig_hva(i32 %n, ...)
+// CHECK: [[THELIST:%.*]] = alloca i8*
+// CHECK: [[CURLIST:%.*]] = load i8** [[THELIST]]
+
+  // TooBigHVA is not actually an HVA, so gets passed indirectly. Only 8 bytes
+  // of stack consumed.
+// CHECK: [[NEXTLIST:%.*]] = getelementptr i8* [[CURLIST]], i32 8
+// CHECK: store i8* [[NEXTLIST]], i8** [[THELIST]]
+
+// CHECK: [[HVAPTRPTR:%.*]] = bitcast i8* [[CURLIST]] to i8**
+// CHECK: [[HVAPTR:%.*]] = load i8** [[HVAPTRPTR]]
+// CHECK: bitcast i8* [[HVAPTR]] to %struct.TooBigHVA*
+  __builtin_va_list thelist;
+  __builtin_va_start(thelist, n);
+  struct TooBigHVA h = __builtin_va_arg(thelist, struct TooBigHVA);
+  return h.d;
+}