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llvm-project/clang/test/CodeGen/volatile-2.c

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Always emit full loads from volatile complex l-values. Return the result of a complex assignment with the original values, not by performing a load from the l-value; this is the correct semantics in C, although not in C++. llvm-svn: 119037
2010-11-14 17:40:28 +08:00
// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -o - %s | FileCheck %s
void test0() {
// CHECK: define void @test0()
// CHECK: [[F:%.*]] = alloca float
// CHECK-NEXT: [[REAL:%.*]] = volatile load float* getelementptr inbounds ({{%.*}} @test0_v, i32 0, i32 0)
// CHECK-NEXT: volatile load float* getelementptr inbounds ({{%.*}} @test0_v, i32 0, i32 1)
// CHECK-NEXT: store float [[REAL]], float* [[F]], align 4
// CHECK-NEXT: ret void
extern volatile _Complex float test0_v;
float f = (float) test0_v;
}
void test1() {
// CHECK: define void @test1()
// CHECK: [[REAL:%.*]] = volatile load float* getelementptr inbounds ({{%.*}} @test1_v, i32 0, i32 0)
// CHECK-NEXT: [[IMAG:%.*]] = volatile load float* getelementptr inbounds ({{%.*}} @test1_v, i32 0, i32 1)
// CHECK-NEXT: volatile store float [[REAL]], float* getelementptr inbounds ({{%.*}} @test1_v, i32 0, i32 0)
// CHECK-NEXT: volatile store float [[IMAG]], float* getelementptr inbounds ({{%.*}} @test1_v, i32 0, i32 1)
// CHECK-NEXT: ret void
extern volatile _Complex float test1_v;
test1_v = test1_v;
}