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llvm-project/clang/test/CodeGen/ppc64-varargs-complex.c

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clang/test: REQUIRES: s/ppc{32|64}-registered-target/powerpc-registered-target/ llvm-svn: 196349
2013-12-04 11:41:15 +08:00
// REQUIRES: powerpc-registered-target
This patch addresses varargs processing for small complex types under the 64-bit PowerPC ELF ABI. The ABI requires that the real and imaginary parts of a complex argument each occupy their own doubleword. Arguments smaller than 8 bytes are right-adjusted within the doubleword. Clang expects EmitVAARG() to return a pointer to a structure in which the real and imaginary parts are packed adjacently in memory. To accomplish this, we generate code to load the code appropriately from the varargs location and pack the values into a temporary variable in the form Clang expects, returning a pointer to that structure. The test case demonstrates correct code generation for all "small" complex types on PPC64: int, short, char, and float. llvm-svn: 172438
2013-01-15 01:45:36 +08:00
// RUN: %clang_cc1 -triple powerpc64-unknown-linux-gnu -emit-llvm -o - %s | FileCheck %s
#include <stdarg.h>
void testva (int n, ...)
{
va_list ap;
_Complex int i = va_arg(ap, _Complex int);
// CHECK: %[[VAR40:[A-Za-z0-9.]+]] = load i8** %[[VAR100:[A-Za-z0-9.]+]]
// CHECK-NEXT: %[[VAR41:[A-Za-z0-9.]+]] = getelementptr i8* %[[VAR40]], i64 16
// CHECK-NEXT: store i8* %[[VAR41]], i8** %[[VAR100]]
// CHECK-NEXT: %[[VAR1:[A-Za-z0-9.]+]] = ptrtoint i8* %[[VAR40]] to i64
// CHECK-NEXT: %[[VAR2:[A-Za-z0-9.]+]] = add i64 %[[VAR1]], 4
// CHECK-NEXT: %[[VAR3:[A-Za-z0-9.]+]] = add i64 %[[VAR1]], 12
// CHECK-NEXT: %[[VAR4:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR2]] to i32*
// CHECK-NEXT: %[[VAR5:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR3]] to i32*
// CHECK-NEXT: %[[VAR6:[A-Za-z0-9.]+]] = load i32* %[[VAR4]]
// CHECK-NEXT: %[[VAR7:[A-Za-z0-9.]+]] = load i32* %[[VAR5]]
// CHECK-NEXT: %[[VAR8:[A-Za-z0-9.]+]] = getelementptr inbounds { i32, i32 }* %[[VAR0:[A-Za-z0-9.]+]], i32 0, i32 0
// CHECK-NEXT: %[[VAR9:[A-Za-z0-9.]+]] = getelementptr inbounds { i32, i32 }* %[[VAR0]], i32 0, i32 1
// CHECK-NEXT: store i32 %[[VAR6]], i32* %[[VAR8]]
// CHECK-NEXT: store i32 %[[VAR7]], i32* %[[VAR9]]
_Complex short s = va_arg(ap, _Complex short);
// CHECK: %[[VAR50:[A-Za-z0-9.]+]] = load i8** %[[VAR100:[A-Za-z0-9.]+]]
// CHECK-NEXT: %[[VAR51:[A-Za-z0-9.]+]] = getelementptr i8* %[[VAR50]], i64 16
// CHECK-NEXT: store i8* %[[VAR51]], i8** %[[VAR100]]
// CHECK: %[[VAR11:[A-Za-z0-9.]+]] = ptrtoint i8* %{{[A-Za-z0-9.]+}} to i64
// CHECK-NEXT: %[[VAR12:[A-Za-z0-9.]+]] = add i64 %[[VAR11]], 6
// CHECK-NEXT: %[[VAR13:[A-Za-z0-9.]+]] = add i64 %[[VAR11]], 14
// CHECK-NEXT: %[[VAR14:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR12]] to i16*
// CHECK-NEXT: %[[VAR15:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR13]] to i16*
// CHECK-NEXT: %[[VAR16:[A-Za-z0-9.]+]] = load i16* %[[VAR14]]
// CHECK-NEXT: %[[VAR17:[A-Za-z0-9.]+]] = load i16* %[[VAR15]]
// CHECK-NEXT: %[[VAR18:[A-Za-z0-9.]+]] = getelementptr inbounds { i16, i16 }* %[[VAR10:[A-Za-z0-9.]+]], i32 0, i32 0
// CHECK-NEXT: %[[VAR19:[A-Za-z0-9.]+]] = getelementptr inbounds { i16, i16 }* %[[VAR10]], i32 0, i32 1
// CHECK-NEXT: store i16 %[[VAR16]], i16* %[[VAR18]]
// CHECK-NEXT: store i16 %[[VAR17]], i16* %[[VAR19]]
_Complex char c = va_arg(ap, _Complex char);
// CHECK: %[[VAR60:[A-Za-z0-9.]+]] = load i8** %[[VAR100:[A-Za-z0-9.]+]]
// CHECK-NEXT: %[[VAR61:[A-Za-z0-9.]+]] = getelementptr i8* %[[VAR60]], i64 16
// CHECK-NEXT: store i8* %[[VAR61]], i8** %[[VAR100]]
// CHECK: %[[VAR21:[A-Za-z0-9.]+]] = ptrtoint i8* %{{[A-Za-z0-9.]+}} to i64
// CHECK-NEXT: %[[VAR22:[A-Za-z0-9.]+]] = add i64 %[[VAR21]], 7
// CHECK-NEXT: %[[VAR23:[A-Za-z0-9.]+]] = add i64 %[[VAR21]], 15
// CHECK-NEXT: %[[VAR24:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR22]] to i8*
// CHECK-NEXT: %[[VAR25:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR23]] to i8*
// CHECK-NEXT: %[[VAR26:[A-Za-z0-9.]+]] = load i8* %[[VAR24]]
// CHECK-NEXT: %[[VAR27:[A-Za-z0-9.]+]] = load i8* %[[VAR25]]
// CHECK-NEXT: %[[VAR28:[A-Za-z0-9.]+]] = getelementptr inbounds { i8, i8 }* %[[VAR20:[A-Za-z0-9.]+]], i32 0, i32 0
// CHECK-NEXT: %[[VAR29:[A-Za-z0-9.]+]] = getelementptr inbounds { i8, i8 }* %[[VAR20]], i32 0, i32 1
// CHECK-NEXT: store i8 %[[VAR26]], i8* %[[VAR28]]
// CHECK-NEXT: store i8 %[[VAR27]], i8* %[[VAR29]]
_Complex float f = va_arg(ap, _Complex float);
// CHECK: %[[VAR70:[A-Za-z0-9.]+]] = load i8** %[[VAR100:[A-Za-z0-9.]+]]
// CHECK-NEXT: %[[VAR71:[A-Za-z0-9.]+]] = getelementptr i8* %[[VAR70]], i64 16
// CHECK-NEXT: store i8* %[[VAR71]], i8** %[[VAR100]]
// CHECK: %[[VAR31:[A-Za-z0-9.]+]] = ptrtoint i8* %{{[A-Za-z0-9.]+}} to i64
// CHECK-NEXT: %[[VAR32:[A-Za-z0-9.]+]] = add i64 %[[VAR31]], 4
// CHECK-NEXT: %[[VAR33:[A-Za-z0-9.]+]] = add i64 %[[VAR31]], 12
// CHECK-NEXT: %[[VAR34:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR32]] to float*
// CHECK-NEXT: %[[VAR35:[A-Za-z0-9.]+]] = inttoptr i64 %[[VAR33]] to float*
// CHECK-NEXT: %[[VAR36:[A-Za-z0-9.]+]] = load float* %[[VAR34]]
// CHECK-NEXT: %[[VAR37:[A-Za-z0-9.]+]] = load float* %[[VAR35]]
// CHECK-NEXT: %[[VAR38:[A-Za-z0-9.]+]] = getelementptr inbounds { float, float }* %[[VAR30:[A-Za-z0-9.]+]], i32 0, i32 0
// CHECK-NEXT: %[[VAR39:[A-Za-z0-9.]+]] = getelementptr inbounds { float, float }* %[[VAR30]], i32 0, i32 1
// CHECK-NEXT: store float %[[VAR36]], float* %[[VAR38]]
// CHECK-NEXT: store float %[[VAR37]], float* %[[VAR39]]
}