From 222e2a7620e6520ffaf4fc4e69d79c18da31542e Mon Sep 17 00:00:00 2001 From: "Zancanaro; Carlo" Date: Mon, 24 Sep 2012 09:58:17 +1000 Subject: Add the clang library to the repo (with some of my changes, too). --- clang/test/CodeGen/assign.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 clang/test/CodeGen/assign.c (limited to 'clang/test/CodeGen/assign.c') diff --git a/clang/test/CodeGen/assign.c b/clang/test/CodeGen/assign.c new file mode 100644 index 0000000..fc00896 --- /dev/null +++ b/clang/test/CodeGen/assign.c @@ -0,0 +1,32 @@ +// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - %s | FileCheck %s + +// Check that we don't generate unnecessary reloads. +// +// CHECK: define void @f0() +// CHECK: [[x_0:%.*]] = alloca i32, align 4 +// CHECK-NEXT: [[y_0:%.*]] = alloca i32, align 4 +// CHECK-NEXT: store i32 1, i32* [[x_0]] +// CHECK-NEXT: store i32 1, i32* [[x_0]] +// CHECK-NEXT: store i32 1, i32* [[y_0]] +// CHECK: } +void f0() { + int x, y; + x = 1; + y = (x = 1); +} + +// This used to test that we generate reloads for volatile access, +// but that does not appear to be correct behavior for C. +// +// CHECK: define void @f1() +// CHECK: [[x_1:%.*]] = alloca i32, align 4 +// CHECK-NEXT: [[y_1:%.*]] = alloca i32, align 4 +// CHECK-NEXT: store volatile i32 1, i32* [[x_1]] +// CHECK-NEXT: store volatile i32 1, i32* [[x_1]] +// CHECK-NEXT: store volatile i32 1, i32* [[y_1]] +// CHECK: } +void f1() { + volatile int x, y; + x = 1; + y = (x = 1); +} -- cgit v1.2.3