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b433076fcb
When emitting the storage (or memory copy operations) for constant initializers, the decision whether to split a constant structure or array store into a sequence of field stores or to use `memcpy` is based upon the optimization level and the size of the initializer. In afe8b93ffdfef5d8879e1894b9d7dda40dee2b8d, we extended this by allowing constants to be split when the array (or struct) type does not match the type of data the address to the object (constant) is expected to contain. This may happen when `emitStoresForConstant` is called by `EmitAutoVarInit`, as the element type of the address gets shrunk. When this occurs, let the initializer be split into a bunch of stores only under `-ftrivial-auto-var-init=pattern`. Fixes: https://github.com/llvm/llvm-project/issues/84178.
142 lines
4.5 KiB
C++
142 lines
4.5 KiB
C++
// REQUIRES: arm-registered-target
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// RUN: %clang_cc1 -triple arm-none-none-eabi \
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// RUN: -O2 \
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// RUN: -target-cpu cortex-a8 \
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// RUN: -emit-llvm -o - %s | FileCheck %s
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extern "C" {
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// Base case, nothing interesting.
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struct S {
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int x, y;
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};
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void f0(int, S);
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void f0m(int, int, int, int, int, S);
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void g0() {
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S s = {6, 7};
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f0(1, s);
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f0m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g0
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// CHECK: call void @f0(i32 noundef 1, [2 x i32] [i32 6, i32 7]
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// CHECK: call void @f0m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [2 x i32] [i32 6, i32 7]
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// CHECK: declare void @f0(i32 noundef, [2 x i32])
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// CHECK: declare void @f0m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [2 x i32])
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// Aligned struct, passed according to its natural alignment.
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struct __attribute__((aligned(8))) S8 {
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int x, y;
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} s8;
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void f1(int, S8);
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void f1m(int, int, int, int, int, S8);
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void g1() {
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S8 s = {6, 7};
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f1(1, s);
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f1m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g1
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// CHECK: call void @f1(i32 noundef 1, [2 x i32] [i32 6, i32 7]
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// CHECK: call void @f1m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [2 x i32] [i32 6, i32 7]
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// CHECK: declare void @f1(i32 noundef, [2 x i32])
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// CHECK: declare void @f1m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [2 x i32])
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// Aligned struct, passed according to its natural alignment.
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struct alignas(16) S16 {
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int x, y;
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};
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extern "C" void f2(int, S16);
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extern "C" void f2m(int, int, int, int, int, S16);
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void g2() {
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S16 s = {6, 7};
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f2(1, s);
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f2m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g2
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// CHECK: call void @f2(i32 noundef 1, [4 x i32] [i32 6, i32 7
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// CHECK: call void @f2m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [4 x i32] [i32 6, i32 7
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// CHECK: declare void @f2(i32 noundef, [4 x i32])
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// CHECK: declare void @f2m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [4 x i32])
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// Increased natural alignment.
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struct SF8 {
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int x __attribute__((aligned(8)));
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int y;
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};
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void f3(int, SF8);
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void f3m(int, int, int, int, int, SF8);
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void g3() {
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SF8 s = {6, 7};
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f3(1, s);
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f3m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g3
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// CHECK: call void @f3(i32 noundef 1, [1 x i64] [i64 30064771078]
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// CHECK: call void @f3m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [1 x i64] [i64 30064771078]
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// CHECK: declare void @f3(i32 noundef, [1 x i64])
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// CHECK: declare void @f3m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [1 x i64])
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// Increased natural alignment, capped to 8 though.
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struct SF16 {
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int x;
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int y alignas(16);
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int z, a, b, c, d, e, f, g, h, i, j, k;
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};
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void f4(int, SF16);
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void f4m(int, int, int, int, int, SF16);
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void g4() {
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SF16 s = {6, 7};
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f4(1, s);
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f4m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g4
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// CHECK: call void @f4(i32 noundef 1, ptr noundef nonnull byval(%struct.SF16) align 8
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// CHECK: call void @f4m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, ptr noundef nonnull byval(%struct.SF16) align 8
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// CHECK: declare void @f4(i32 noundef, ptr noundef byval(%struct.SF16) align 8)
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// CHECK: declare void @f4m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, ptr noundef byval(%struct.SF16) align 8)
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// Packed structure.
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struct __attribute__((packed)) P {
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int x;
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long long u;
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};
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void f5(int, P);
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void f5m(int, int, int, int, int, P);
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void g5() {
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P s = {6, 7};
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f5(1, s);
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f5m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g5
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// CHECK: call void @f5(i32 noundef 1, [3 x i32] [i32 6, i32 7, i32 0])
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// CHECK: call void @f5m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [3 x i32] [i32 6, i32 7, i32 0])
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// CHECK: declare void @f5(i32 noundef, [3 x i32])
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// CHECK: declare void @f5m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [3 x i32])
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// Packed and aligned, alignement causes padding at the end.
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struct __attribute__((packed, aligned(8))) P8 {
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int x;
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long long u;
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};
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void f6(int, P8);
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void f6m(int, int, int, int, int, P8);
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void g6() {
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P8 s = {6, 7};
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f6(1, s);
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f6m(1, 2, 3, 4, 5, s);
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}
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// CHECK: define{{.*}} void @g6
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// CHECK: call void @f6(i32 noundef 1, [4 x i32] [i32 6, i32 7, i32 0, i32 undef])
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// CHECK: call void @f6m(i32 noundef 1, i32 noundef 2, i32 noundef 3, i32 noundef 4, i32 noundef 5, [4 x i32] [i32 6, i32 7, i32 0, i32 undef])
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// CHECK: declare void @f6(i32 noundef, [4 x i32])
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// CHECK: declare void @f6m(i32 noundef, i32 noundef, i32 noundef, i32 noundef, i32 noundef, [4 x i32])
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}
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