PTX: Fix various codegen issues

- Emit mad instead of mad.rn for shader model 1.0
- Emit explicit mov.u32 instructions for reading global variables
- (most PTX instructions cannot take global variable immediates)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127895 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Justin Holewinski 2011-03-18 19:24:28 +00:00
parent 35fdeb7b37
commit 8af78c9cf8
7 changed files with 124 additions and 50 deletions

View File

@ -313,13 +313,23 @@ void PTXAsmPrinter::EmitVariableDeclaration(const GlobalVariable *gv) {
const ArrayType* arrayTy = dyn_cast<const ArrayType>(elementTy);
elementTy = arrayTy->getElementType();
unsigned numElements = arrayTy->getNumElements();
while (elementTy->isArrayTy()) {
arrayTy = dyn_cast<const ArrayType>(elementTy);
elementTy = arrayTy->getElementType();
numElements *= arrayTy->getNumElements();
}
// FIXME: isPrimitiveType() == false for i16?
assert(elementTy->isSingleValueType() &&
"Non-primitive types are not handled");
// Compute the size of the array, in bytes.
uint64_t arraySize = (elementTy->getPrimitiveSizeInBits() >> 3)
* arrayTy->getNumElements();
* numElements;
decl += ".b8 ";
decl += gvsym->getName();

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@ -64,6 +64,8 @@ const char *PTXTargetLowering::getTargetNodeName(unsigned Opcode) const {
switch (Opcode) {
default:
llvm_unreachable("Unknown opcode");
case PTXISD::COPY_ADDRESS:
return "PTXISD::COPY_ADDRESS";
case PTXISD::READ_PARAM:
return "PTXISD::READ_PARAM";
case PTXISD::EXIT:
@ -82,7 +84,14 @@ LowerGlobalAddress(SDValue Op, SelectionDAG &DAG) const {
EVT PtrVT = getPointerTy();
DebugLoc dl = Op.getDebugLoc();
const GlobalValue *GV = cast<GlobalAddressSDNode>(Op)->getGlobal();
return DAG.getTargetGlobalAddress(GV, dl, PtrVT);
SDValue targetGlobal = DAG.getTargetGlobalAddress(GV, dl, PtrVT);
SDValue movInstr = DAG.getNode(PTXISD::COPY_ADDRESS,
dl,
MVT::i32,
targetGlobal);
return movInstr;
}
//===----------------------------------------------------------------------===//

View File

@ -26,7 +26,8 @@ namespace PTXISD {
FIRST_NUMBER = ISD::BUILTIN_OP_END,
READ_PARAM,
EXIT,
RET
RET,
COPY_ADDRESS
};
} // namespace PTXISD

View File

@ -175,6 +175,8 @@ def PTXexit
: SDNode<"PTXISD::EXIT", SDTNone, [SDNPHasChain]>;
def PTXret
: SDNode<"PTXISD::RET", SDTNone, [SDNPHasChain]>;
def PTXcopyaddress
: SDNode<"PTXISD::COPY_ADDRESS", SDTypeProfile<1, 1, []>, []>;
//===----------------------------------------------------------------------===//
// Instruction Class Templates
@ -441,7 +443,8 @@ def FDIVri64SM10 : InstPTX<(outs RRegf64:$d),
// In the short term, mad is supported on all PTX versions and we use a
// default rounding mode no matter what shader model or PTX version.
// TODO: Allow the rounding mode to be selectable through llc.
defm FMAD : PTX_FLOAT_4OP<"mad.rn", fmul, fadd>;
defm FMADSM13 : PTX_FLOAT_4OP<"mad.rn", fmul, fadd>, Requires<[SupportsSM13]>;
defm FMAD : PTX_FLOAT_4OP<"mad", fmul, fadd>, Requires<[DoesNotSupportSM13]>;
///===- Floating-Point Intrinsic Instructions -----------------------------===//
@ -533,6 +536,12 @@ let isReMaterializable = 1, isAsCheapAsAMove = 1 in {
[(set RRegf64:$d, fpimm:$a)]>;
}
let isReMaterializable = 1, isAsCheapAsAMove = 1 in {
def MOVaddr
: InstPTX<(outs RRegu32:$d), (ins i32imm:$a), "mov.u32\t$d, $a",
[(set RRegu32:$d, (PTXcopyaddress tglobaladdr:$a))]>;
}
// Loads
defm LDg : PTX_LD_ALL<"ld.global", load_global>;
defm LDc : PTX_LD_ALL<"ld.const", load_constant>;

View File

@ -198,7 +198,8 @@ entry:
define ptx_device i16 @t4_global_u16() {
entry:
;CHECK: ld.global.u16 rh0, [array_i16];
;CHECK: mov.u32 r0, array_i16;
;CHECK-NEXT: ld.global.u16 rh0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16]* @array_i16, i32 0, i32 0
%x = load i16* %i
@ -207,7 +208,8 @@ entry:
define ptx_device i32 @t4_global_u32() {
entry:
;CHECK: ld.global.u32 r0, [array_i32];
;CHECK: mov.u32 r0, array_i32;
;CHECK-NEXT: ld.global.u32 r0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32]* @array_i32, i32 0, i32 0
%x = load i32* %i
@ -216,7 +218,8 @@ entry:
define ptx_device i64 @t4_global_u64() {
entry:
;CHECK: ld.global.u64 rd0, [array_i64];
;CHECK: mov.u32 r0, array_i64;
;CHECK-NEXT: ld.global.u64 rd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64]* @array_i64, i32 0, i32 0
%x = load i64* %i
@ -225,7 +228,8 @@ entry:
define ptx_device float @t4_global_f32() {
entry:
;CHECK: ld.global.f32 f0, [array_float];
;CHECK: mov.u32 r0, array_float;
;CHECK-NEXT: ld.global.f32 f0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x float]* @array_float, i32 0, i32 0
%x = load float* %i
@ -234,7 +238,8 @@ entry:
define ptx_device double @t4_global_f64() {
entry:
;CHECK: ld.global.f64 fd0, [array_double];
;CHECK: mov.u32 r0, array_double;
;CHECK-NEXT: ld.global.f64 fd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x double]* @array_double, i32 0, i32 0
%x = load double* %i
@ -243,7 +248,8 @@ entry:
define ptx_device i16 @t4_const_u16() {
entry:
;CHECK: ld.const.u16 rh0, [array_constant_i16];
;CHECK: mov.u32 r0, array_constant_i16;
;CHECK-NEXT: ld.const.u16 rh0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16] addrspace(1)* @array_constant_i16, i32 0, i32 0
%x = load i16 addrspace(1)* %i
@ -252,7 +258,8 @@ entry:
define ptx_device i32 @t4_const_u32() {
entry:
;CHECK: ld.const.u32 r0, [array_constant_i32];
;CHECK: mov.u32 r0, array_constant_i32;
;CHECK-NEXT: ld.const.u32 r0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32] addrspace(1)* @array_constant_i32, i32 0, i32 0
%x = load i32 addrspace(1)* %i
@ -261,7 +268,8 @@ entry:
define ptx_device i64 @t4_const_u64() {
entry:
;CHECK: ld.const.u64 rd0, [array_constant_i64];
;CHECK: mov.u32 r0, array_constant_i64;
;CHECK-NEXT: ld.const.u64 rd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64] addrspace(1)* @array_constant_i64, i32 0, i32 0
%x = load i64 addrspace(1)* %i
@ -270,7 +278,8 @@ entry:
define ptx_device float @t4_const_f32() {
entry:
;CHECK: ld.const.f32 f0, [array_constant_float];
;CHECK: mov.u32 r0, array_constant_float;
;CHECK-NEXT: ld.const.f32 f0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x float] addrspace(1)* @array_constant_float, i32 0, i32 0
%x = load float addrspace(1)* %i
@ -279,7 +288,8 @@ entry:
define ptx_device double @t4_const_f64() {
entry:
;CHECK: ld.const.f64 fd0, [array_constant_double];
;CHECK: mov.u32 r0, array_constant_double;
;CHECK-NEXT: ld.const.f64 fd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x double] addrspace(1)* @array_constant_double, i32 0, i32 0
%x = load double addrspace(1)* %i
@ -288,7 +298,8 @@ entry:
define ptx_device i16 @t4_local_u16() {
entry:
;CHECK: ld.local.u16 rh0, [array_local_i16];
;CHECK: mov.u32 r0, array_local_i16;
;CHECK-NEXT: ld.local.u16 rh0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16] addrspace(2)* @array_local_i16, i32 0, i32 0
%x = load i16 addrspace(2)* %i
@ -297,7 +308,8 @@ entry:
define ptx_device i32 @t4_local_u32() {
entry:
;CHECK: ld.local.u32 r0, [array_local_i32];
;CHECK: mov.u32 r0, array_local_i32;
;CHECK-NEXT: ld.local.u32 r0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32] addrspace(2)* @array_local_i32, i32 0, i32 0
%x = load i32 addrspace(2)* %i
@ -306,7 +318,8 @@ entry:
define ptx_device i64 @t4_local_u64() {
entry:
;CHECK: ld.local.u64 rd0, [array_local_i64];
;CHECK: mov.u32 r0, array_local_i64;
;CHECK-NEXT: ld.local.u64 rd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64] addrspace(2)* @array_local_i64, i32 0, i32 0
%x = load i64 addrspace(2)* %i
@ -315,7 +328,8 @@ entry:
define ptx_device float @t4_local_f32() {
entry:
;CHECK: ld.local.f32 f0, [array_local_float];
;CHECK: mov.u32 r0, array_local_float;
;CHECK-NEXT: ld.local.f32 f0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x float] addrspace(2)* @array_local_float, i32 0, i32 0
%x = load float addrspace(2)* %i
@ -324,7 +338,8 @@ entry:
define ptx_device double @t4_local_f64() {
entry:
;CHECK: ld.local.f64 fd0, [array_local_double];
;CHECK: mov.u32 r0, array_local_double;
;CHECK-NEXT: ld.local.f64 fd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x double] addrspace(2)* @array_local_double, i32 0, i32 0
%x = load double addrspace(2)* %i
@ -333,7 +348,8 @@ entry:
define ptx_device i16 @t4_shared_u16() {
entry:
;CHECK: ld.shared.u16 rh0, [array_shared_i16];
;CHECK: mov.u32 r0, array_shared_i16;
;CHECK-NEXT: ld.shared.u16 rh0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16] addrspace(4)* @array_shared_i16, i32 0, i32 0
%x = load i16 addrspace(4)* %i
@ -342,7 +358,8 @@ entry:
define ptx_device i32 @t4_shared_u32() {
entry:
;CHECK: ld.shared.u32 r0, [array_shared_i32];
;CHECK: mov.u32 r0, array_shared_i32;
;CHECK-NEXT: ld.shared.u32 r0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32] addrspace(4)* @array_shared_i32, i32 0, i32 0
%x = load i32 addrspace(4)* %i
@ -351,7 +368,8 @@ entry:
define ptx_device i64 @t4_shared_u64() {
entry:
;CHECK: ld.shared.u64 rd0, [array_shared_i64];
;CHECK: mov.u32 r0, array_shared_i64;
;CHECK-NEXT: ld.shared.u64 rd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64] addrspace(4)* @array_shared_i64, i32 0, i32 0
%x = load i64 addrspace(4)* %i
@ -360,7 +378,8 @@ entry:
define ptx_device float @t4_shared_f32() {
entry:
;CHECK: ld.shared.f32 f0, [array_shared_float];
;CHECK: mov.u32 r0, array_shared_float;
;CHECK-NEXT: ld.shared.f32 f0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x float] addrspace(4)* @array_shared_float, i32 0, i32 0
%x = load float addrspace(4)* %i
@ -369,7 +388,8 @@ entry:
define ptx_device double @t4_shared_f64() {
entry:
;CHECK: ld.shared.f64 fd0, [array_shared_double];
;CHECK: mov.u32 r0, array_shared_double;
;CHECK-NEXT: ld.shared.f64 fd0, [r0];
;CHECK-NEXT: ret;
%i = getelementptr [10 x double] addrspace(4)* @array_shared_double, i32 0, i32 0
%x = load double addrspace(4)* %i
@ -378,7 +398,8 @@ entry:
define ptx_device i16 @t5_u16() {
entry:
;CHECK: ld.global.u16 rh0, [array_i16+2];
;CHECK: mov.u32 r0, array_i16;
;CHECK-NEXT: ld.global.u16 rh0, [r0+2];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16]* @array_i16, i32 0, i32 1
%x = load i16* %i
@ -387,7 +408,8 @@ entry:
define ptx_device i32 @t5_u32() {
entry:
;CHECK: ld.global.u32 r0, [array_i32+4];
;CHECK: mov.u32 r0, array_i32;
;CHECK-NEXT: ld.global.u32 r0, [r0+4];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32]* @array_i32, i32 0, i32 1
%x = load i32* %i
@ -396,7 +418,8 @@ entry:
define ptx_device i64 @t5_u64() {
entry:
;CHECK: ld.global.u64 rd0, [array_i64+8];
;CHECK: mov.u32 r0, array_i64;
;CHECK-NEXT: ld.global.u64 rd0, [r0+8];
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64]* @array_i64, i32 0, i32 1
%x = load i64* %i
@ -405,7 +428,8 @@ entry:
define ptx_device float @t5_f32() {
entry:
;CHECK: ld.global.f32 f0, [array_float+4];
;CHECK: mov.u32 r0, array_float;
;CHECK-NEXT: ld.global.f32 f0, [r0+4];
;CHECK-NEXT: ret;
%i = getelementptr [10 x float]* @array_float, i32 0, i32 1
%x = load float* %i
@ -414,7 +438,8 @@ entry:
define ptx_device double @t5_f64() {
entry:
;CHECK: ld.global.f64 fd0, [array_double+8];
;CHECK: mov.u32 r0, array_double;
;CHECK-NEXT: ld.global.f64 fd0, [r0+8];
;CHECK-NEXT: ret;
%i = getelementptr [10 x double]* @array_double, i32 0, i32 1
%x = load double* %i

View File

@ -1,4 +1,4 @@
; RUN: llc < %s -march=ptx | FileCheck %s
; RUN: llc < %s -march=ptx -mattr=+sm13 | FileCheck %s
define ptx_device float @t1_f32(float %x, float %y, float %z) {
; CHECK: mad.rn.f32 f0, f1, f2, f3;

View File

@ -203,7 +203,8 @@ entry:
define ptx_device void @t4_global_u16(i16 %x) {
entry:
;CHECK: st.global.u16 [array_i16], rh1;
;CHECK: mov.u32 r0, array_i16;
;CHECK-NEXT: st.global.u16 [r0], rh1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16]* @array_i16, i16 0, i16 0
store i16 %x, i16* %i
@ -212,7 +213,8 @@ entry:
define ptx_device void @t4_global_u32(i32 %x) {
entry:
;CHECK: st.global.u32 [array_i32], r1;
;CHECK: mov.u32 r0, array_i32;
;CHECK-NEXT: st.global.u32 [r0], r1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32]* @array_i32, i32 0, i32 0
store i32 %x, i32* %i
@ -221,7 +223,8 @@ entry:
define ptx_device void @t4_global_u64(i64 %x) {
entry:
;CHECK: st.global.u64 [array_i64], rd1;
;CHECK: mov.u32 r0, array_i64;
;CHECK-NEXT: st.global.u64 [r0], rd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64]* @array_i64, i32 0, i32 0
store i64 %x, i64* %i
@ -230,7 +233,8 @@ entry:
define ptx_device void @t4_global_f32(float %x) {
entry:
;CHECK: st.global.f32 [array_float], f1;
;CHECK: mov.u32 r0, array_float;
;CHECK-NEXT: st.global.f32 [r0], f1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x float]* @array_float, i32 0, i32 0
store float %x, float* %i
@ -239,7 +243,8 @@ entry:
define ptx_device void @t4_global_f64(double %x) {
entry:
;CHECK: st.global.f64 [array_double], fd1;
;CHECK: mov.u32 r0, array_double;
;CHECK-NEXT: st.global.f64 [r0], fd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x double]* @array_double, i32 0, i32 0
store double %x, double* %i
@ -248,7 +253,8 @@ entry:
define ptx_device void @t4_local_u16(i16 %x) {
entry:
;CHECK: st.local.u16 [array_local_i16], rh1;
;CHECK: mov.u32 r0, array_local_i16;
;CHECK-NEXT: st.local.u16 [r0], rh1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16] addrspace(2)* @array_local_i16, i32 0, i32 0
store i16 %x, i16 addrspace(2)* %i
@ -257,7 +263,8 @@ entry:
define ptx_device void @t4_local_u32(i32 %x) {
entry:
;CHECK: st.local.u32 [array_local_i32], r1;
;CHECK: mov.u32 r0, array_local_i32;
;CHECK-NEXT: st.local.u32 [r0], r1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32] addrspace(2)* @array_local_i32, i32 0, i32 0
store i32 %x, i32 addrspace(2)* %i
@ -266,7 +273,8 @@ entry:
define ptx_device void @t4_local_u64(i64 %x) {
entry:
;CHECK: st.local.u64 [array_local_i64], rd1;
;CHECK: mov.u32 r0, array_local_i64;
;CHECK-NEXT: st.local.u64 [r0], rd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64] addrspace(2)* @array_local_i64, i32 0, i32 0
store i64 %x, i64 addrspace(2)* %i
@ -275,7 +283,8 @@ entry:
define ptx_device void @t4_local_f32(float %x) {
entry:
;CHECK: st.local.f32 [array_local_float], f1;
;CHECK: mov.u32 r0, array_local_float;
;CHECK-NEXT: st.local.f32 [r0], f1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x float] addrspace(2)* @array_local_float, i32 0, i32 0
store float %x, float addrspace(2)* %i
@ -284,7 +293,8 @@ entry:
define ptx_device void @t4_local_f64(double %x) {
entry:
;CHECK: st.local.f64 [array_local_double], fd1;
;CHECK: mov.u32 r0, array_local_double;
;CHECK-NEXT: st.local.f64 [r0], fd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x double] addrspace(2)* @array_local_double, i32 0, i32 0
store double %x, double addrspace(2)* %i
@ -293,7 +303,8 @@ entry:
define ptx_device void @t4_shared_u16(i16 %x) {
entry:
;CHECK: st.shared.u16 [array_shared_i16], rh1;
;CHECK: mov.u32 r0, array_shared_i16;
;CHECK-NEXT: st.shared.u16 [r0], rh1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16] addrspace(4)* @array_shared_i16, i32 0, i32 0
store i16 %x, i16 addrspace(4)* %i
@ -302,7 +313,8 @@ entry:
define ptx_device void @t4_shared_u32(i32 %x) {
entry:
;CHECK: st.shared.u32 [array_shared_i32], r1;
;CHECK: mov.u32 r0, array_shared_i32;
;CHECK-NEXT: st.shared.u32 [r0], r1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32] addrspace(4)* @array_shared_i32, i32 0, i32 0
store i32 %x, i32 addrspace(4)* %i
@ -311,7 +323,8 @@ entry:
define ptx_device void @t4_shared_u64(i64 %x) {
entry:
;CHECK: st.shared.u64 [array_shared_i64], rd1;
;CHECK: mov.u32 r0, array_shared_i64;
;CHECK-NEXT: st.shared.u64 [r0], rd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64] addrspace(4)* @array_shared_i64, i32 0, i32 0
store i64 %x, i64 addrspace(4)* %i
@ -320,7 +333,8 @@ entry:
define ptx_device void @t4_shared_f32(float %x) {
entry:
;CHECK: st.shared.f32 [array_shared_float], f1;
;CHECK: mov.u32 r0, array_shared_float;
;CHECK-NEXT: st.shared.f32 [r0], f1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x float] addrspace(4)* @array_shared_float, i32 0, i32 0
store float %x, float addrspace(4)* %i
@ -329,7 +343,8 @@ entry:
define ptx_device void @t4_shared_f64(double %x) {
entry:
;CHECK: st.shared.f64 [array_shared_double], fd1;
;CHECK: mov.u32 r0, array_shared_double;
;CHECK-NEXT: st.shared.f64 [r0], fd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x double] addrspace(4)* @array_shared_double, i32 0, i32 0
store double %x, double addrspace(4)* %i
@ -338,7 +353,8 @@ entry:
define ptx_device void @t5_u16(i16 %x) {
entry:
;CHECK: st.global.u16 [array_i16+2], rh1;
;CHECK: mov.u32 r0, array_i16;
;CHECK-NEXT: st.global.u16 [r0+2], rh1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i16]* @array_i16, i32 0, i32 1
store i16 %x, i16* %i
@ -347,7 +363,8 @@ entry:
define ptx_device void @t5_u32(i32 %x) {
entry:
;CHECK: st.global.u32 [array_i32+4], r1;
;CHECK: mov.u32 r0, array_i32;
;CHECK-NEXT: st.global.u32 [r0+4], r1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i32]* @array_i32, i32 0, i32 1
store i32 %x, i32* %i
@ -356,7 +373,8 @@ entry:
define ptx_device void @t5_u64(i64 %x) {
entry:
;CHECK: st.global.u64 [array_i64+8], rd1;
;CHECK: mov.u32 r0, array_i64;
;CHECK-NEXT: st.global.u64 [r0+8], rd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x i64]* @array_i64, i32 0, i32 1
store i64 %x, i64* %i
@ -365,7 +383,8 @@ entry:
define ptx_device void @t5_f32(float %x) {
entry:
;CHECK: st.global.f32 [array_float+4], f1;
;CHECK: mov.u32 r0, array_float;
;CHECK-NEXT: st.global.f32 [r0+4], f1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x float]* @array_float, i32 0, i32 1
store float %x, float* %i
@ -374,7 +393,8 @@ entry:
define ptx_device void @t5_f64(double %x) {
entry:
;CHECK: st.global.f64 [array_double+8], fd1;
;CHECK: mov.u32 r0, array_double;
;CHECK-NEXT: st.global.f64 [r0+8], fd1;
;CHECK-NEXT: ret;
%i = getelementptr [10 x double]* @array_double, i32 0, i32 1
store double %x, double* %i