clang/test/CodeGen/volatile-complex.c

   1 // RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
   2
   3 // Validate that volatile _Complex loads and stores are generated
   4 // properly, including their alignment (even when overaligned).
   5 //
   6 // This test assumes that floats are 32-bit aligned and doubles are
   7 // 64-bit aligned, and uses x86-64 as a target that should have this
   8 // property.
   9
  10 volatile _Complex float cf;
  11 volatile _Complex double cd;
  12 volatile _Complex float cf32 __attribute__((aligned(32)));
  13 volatile _Complex double cd32 __attribute__((aligned(32)));
  14
  15 // CHECK-LABEL: define{{.*}} void @test_cf()
  16 void test_cf(void) {
  17   // CHECK:      load volatile float, ptr @cf, align 4
  18   // CHECK-NEXT: load volatile float, ptr getelementptr inbounds nuw ({ float, float }, ptr @cf, i32 0, i32 1), align 4
  19   (void)(cf);
  20   // CHECK-NEXT: [[R:%.*]] = load volatile float, ptr @cf, align 4
  21   // CHECK-NEXT: [[I:%.*]] = load volatile float, ptr getelementptr inbounds nuw ({ float, float }, ptr @cf, i32 0, i32 1), align 4
  22   // CHECK-NEXT: store volatile float [[R]], ptr @cf, align 4
  23   // CHECK-NEXT: store volatile float [[I]], ptr getelementptr inbounds nuw ({ float, float }, ptr @cf, i32 0, i32 1), align 4
  24   (void)(cf=cf);
  25   // CHECK-NEXT: ret void
  26 }
  27
  28 // CHECK-LABEL: define{{.*}} void @test_cd()
  29 void test_cd(void) {
  30   // CHECK:      load volatile double, ptr @cd, align 8
  31   // CHECK-NEXT: load volatile double, ptr getelementptr inbounds nuw ({ double, double }, ptr @cd, i32 0, i32 1), align 8
  32   (void)(cd);
  33   // CHECK-NEXT: [[R:%.*]] = load volatile double, ptr @cd, align 8
  34   // CHECK-NEXT: [[I:%.*]] = load volatile double, ptr getelementptr inbounds nuw ({ double, double }, ptr @cd, i32 0, i32 1), align 8
  35   // CHECK-NEXT: store volatile double [[R]], ptr @cd, align 8
  36   // CHECK-NEXT: store volatile double [[I]], ptr getelementptr inbounds nuw ({ double, double }, ptr @cd, i32 0, i32 1), align 8
  37   (void)(cd=cd);
  38   // CHECK-NEXT: ret void
  39 }
  40
  41 // CHECK-LABEL: define{{.*}} void @test_cf32()
  42 void test_cf32(void) {
  43   // CHECK:      load volatile float, ptr @cf32, align 32
  44   // CHECK-NEXT: load volatile float, ptr getelementptr inbounds nuw ({ float, float }, ptr @cf32, i32 0, i32 1), align 4
  45   (void)(cf32);
  46   // CHECK-NEXT: [[R:%.*]] = load volatile float, ptr @cf32, align 32
  47   // CHECK-NEXT: [[I:%.*]] = load volatile float, ptr getelementptr inbounds nuw ({ float, float }, ptr @cf32, i32 0, i32 1), align 4
  48   // CHECK-NEXT: store volatile float [[R]], ptr @cf32, align 32
  49   // CHECK-NEXT: store volatile float [[I]], ptr getelementptr inbounds nuw ({ float, float }, ptr @cf32, i32 0, i32 1), align 4
  50   (void)(cf32=cf32);
  51   // CHECK-NEXT: ret void
  52 }
  53
  54 // CHECK-LABEL: define{{.*}} void @test_cd32()
  55 void test_cd32(void) {
  56   // CHECK:      load volatile double, ptr @cd32, align 32
  57   // CHECK-NEXT: load volatile double, ptr getelementptr inbounds nuw ({ double, double }, ptr @cd32, i32 0, i32 1), align 8
  58   (void)(cd32);
  59   // CHECK-NEXT: [[R:%.*]] = load volatile double, ptr @cd32, align 32
  60   // CHECK-NEXT: [[I:%.*]] = load volatile double, ptr getelementptr inbounds nuw ({ double, double }, ptr @cd32, i32 0, i32 1), align 8
  61   // CHECK-NEXT: store volatile double [[R]], ptr @cd32, align 32
  62   // CHECK-NEXT: store volatile double [[I]], ptr getelementptr inbounds nuw ({ double, double }, ptr @cd32, i32 0, i32 1), align 8
  63   (void)(cd32=cd32);
  64   // CHECK-NEXT: ret void
  65 }