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[Backport to 13][OpaquePointers] Handle llvm.memset intrinsic mangling mismatches #2184

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Oct 26, 2023
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[Backport to 13][OpaquePointers] Handle llvm.memset intrinsic mangling mismatches #2184

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9 changes: 9 additions & 0 deletions lib/SPIRV/SPIRVReader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -2737,6 +2737,15 @@ Function *SPIRVToLLVM::transFunction(SPIRVFunction *BF) {
// assuming llvm.memset is supported by the device compiler. If this
// assumption is not safe, we should have a command line option to control
// this behavior.
if (FuncNameRef.startswith("spirv.llvm_memset_p")) {
// We can't guarantee that the name is correctly mangled due to opaque
// pointers. Derive the correct name from the function type.
FuncName =
Intrinsic::getDeclaration(M, Intrinsic::memset,
{FT->getParamType(0), FT->getParamType(2)})
->getName()
.str();
}
if (FuncNameRef.consume_front("spirv.")) {
FuncNameRef.consume_back(".volatile");
FuncName = FuncNameRef.str();
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239 changes: 239 additions & 0 deletions test/llvm-intrinsics/memset-opaque.spt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,239 @@
; RUN: llvm-spirv %s -to-binary -o %t.spv
; RUN: llvm-spirv -r %t.spv -o %t.bc
; RUN: llvm-dis < %t.bc | FileCheck %s --check-prefix=CHECK-LLVM

; Verify that the reverse translation works correctly and converts opaque-type generated intrinsics
; (like 'spirv.llvm_memset_p0_i32') to the typed-pointer signatures (like to '@llvm.memset.p0i8.i32').

; CHECK-LLVM: call void @llvm.memset.p4i8.i32(i8 addrspace(4)* align 4 %1, i8 0, i32 12, i1 false)
; CHECK-LLVM: call void @llvm.memcpy.p0i8.p2i8.i32(i8* align 4 %3, i8 addrspace(2)* align 4 %4, i32 4, i1 false)
; CHECK-LLVM: call void @llvm.memset.p0a4i8.i32([4 x i8]* %x, i8 %v, i32 3, i1 false)
; CHECK-LLVM: call void @llvm.memset.p0a4i8.i32([4 x i8]* %x, i8 %v, i32 %s1, i1 false)
; CHECK-LLVM: call void @llvm.memset.p3s_struct.S1s.i32(%struct.S1 addrspace(3)* %a, i8 %v, i32 %s1, i1 false)
; CHECK-LLVM: call void @llvm.memset.p1s_struct.S1s.i64(%struct.S1 addrspace(1)* %b, i8 %v, i64 %s2, i1 false)
; CHECK-LLVM: call void @llvm.memset.p1s_struct.S1s.i64(%struct.S1 addrspace(1)* %b, i8 %v, i64 %s2, i1 true)

119734787 65536 393230 117 0
2 Capability Addresses
2 Capability Linkage
2 Capability Kernel
2 Capability Int64
2 Capability GenericPointer
2 Capability Int8
5 ExtInstImport 1 "OpenCL.std"
3 MemoryModel 1 2
3 Source 4 202000
5 Name 3 "struct.S1"
5 Name 9 "_Z5foo11v"
5 Name 10 "agg.result"
3 Name 11 "s1"
3 Name 12 "s2"
3 Name 13 "v"
3 Name 18 "x"
9 Name 39 "spirv.llvm_memset_p0_i32"
4 Name 40 "dest"
3 Name 41 "val"
3 Name 42 "len"
5 Name 43 "isvolatile"
3 Name 47 "a"
9 Name 49 "spirv.llvm_memset_p3_i32"
4 Name 50 "dest"
3 Name 51 "val"
3 Name 52 "len"
5 Name 53 "isvolatile"
3 Name 56 "b"
9 Name 58 "spirv.llvm_memset_p1_i64"
4 Name 59 "dest"
3 Name 60 "val"
3 Name 61 "len"
5 Name 62 "isvolatile"
11 Name 65 "spirv.llvm_memset_p1_i64.volatile"
4 Name 66 "dest"
3 Name 67 "val"
3 Name 68 "len"
5 Name 69 "isvolatile"
4 Name 71 "entry"
6 Name 72 "loadstoreloop"
4 Name 73 "split"
4 Name 83 "entry"
6 Name 84 "loadstoreloop"
4 Name 85 "split"
4 Name 94 "entry"
6 Name 95 "loadstoreloop"
4 Name 96 "split"
4 Name 107 "entry"
6 Name 108 "loadstoreloop"
4 Name 109 "split"
7 Decorate 9 LinkageAttributes "_Z5foo11v" Export
4 Decorate 10 FuncParamAttr 4
4 Decorate 10 FuncParamAttr 5
4 Decorate 10 FuncParamAttr 3
4 Decorate 18 Alignment 1
3 Decorate 25 Constant
3 Decorate 33 Constant
11 Decorate 39 LinkageAttributes "spirv.llvm_memset_p0_i32" Export
11 Decorate 49 LinkageAttributes "spirv.llvm_memset_p3_i32" Export
11 Decorate 58 LinkageAttributes "spirv.llvm_memset_p1_i64" Export
13 Decorate 65 LinkageAttributes "spirv.llvm_memset_p1_i64.volatile" Export
4 TypeInt 4 32 0
4 TypeInt 6 64 0
4 TypeInt 7 8 0
4 Constant 4 15 4
4 Constant 4 21 12
4 Constant 7 30 21
4 Constant 4 35 3
4 Constant 4 74 0
4 Constant 4 80 1
5 Constant 6 97 0 0
5 Constant 6 104 1 0
2 TypeVoid 2
5 TypeStruct 3 4 4 4

4 TypePointer 5 8 3
7 TypeFunction 8 2 5 4 6 7
4 TypeArray 16 7 15
4 TypePointer 17 7 16
4 TypePointer 19 8 7
4 TypeArray 22 7 21
4 TypePointer 24 0 22
4 TypePointer 26 0 7
4 TypePointer 28 7 7
4 TypePointer 32 0 16
2 TypeBool 36
7 TypeFunction 38 2 17 7 4 36
4 TypePointer 46 4 3
7 TypeFunction 48 2 46 7 4 36
4 TypePointer 55 5 3
7 TypeFunction 57 2 55 7 6 36
4 TypePointer 89 4 7
4 TypePointer 101 5 7
3 ConstantNull 22 23
5 Variable 24 25 0 23
7 ConstantComposite 16 31 30 30 30 30

5 Variable 32 33 0 31
3 ConstantFalse 36 37
3 ConstantTrue 36 64


5 Function 2 9 0 8
3 FunctionParameter 5 10
3 FunctionParameter 4 11
3 FunctionParameter 6 12
3 FunctionParameter 7 13

2 Label 14
4 Variable 17 18 7
4 Bitcast 19 20 10
4 Bitcast 26 27 25
6 CopyMemorySized 20 27 21 2 4
4 Bitcast 28 29 18
4 Bitcast 26 34 33
6 CopyMemorySized 29 34 15 2 4
8 FunctionCall 2 44 39 18 13 35 37
8 FunctionCall 2 45 39 18 13 11 37
4 GenericCastToPtr 46 47 10
8 FunctionCall 2 54 49 47 13 11 37
4 GenericCastToPtr 55 56 10
8 FunctionCall 2 63 58 56 13 12 37
8 FunctionCall 2 70 65 56 13 12 64
1 Return

1 FunctionEnd

5 Function 2 39 0 38
3 FunctionParameter 17 40
3 FunctionParameter 7 41
3 FunctionParameter 4 42
3 FunctionParameter 36 43

2 Label 71
5 IEqual 36 75 74 42
4 BranchConditional 75 73 72

2 Label 72
7 Phi 4 77 74 71 76 72
4 Bitcast 28 78 40
5 InBoundsPtrAccessChain 28 79 78 77
5 Store 79 41 2 1
5 IAdd 4 76 77 80
5 ULessThan 36 82 76 42
4 BranchConditional 82 72 73

2 Label 73
1 Return

1 FunctionEnd

5 Function 2 49 0 48
3 FunctionParameter 46 50
3 FunctionParameter 7 51
3 FunctionParameter 4 52
3 FunctionParameter 36 53

2 Label 83
5 IEqual 36 86 74 52
4 BranchConditional 86 85 84

2 Label 84
7 Phi 4 88 74 83 87 84
4 Bitcast 89 90 50
5 InBoundsPtrAccessChain 89 91 90 88
5 Store 91 51 2 1
5 IAdd 4 87 88 80
5 ULessThan 36 93 87 52
4 BranchConditional 93 84 85

2 Label 85
1 Return

1 FunctionEnd

5 Function 2 58 0 57
3 FunctionParameter 55 59
3 FunctionParameter 7 60
3 FunctionParameter 6 61
3 FunctionParameter 36 62

2 Label 94
5 IEqual 36 98 97 61
4 BranchConditional 98 96 95

2 Label 95
7 Phi 6 100 97 94 99 95
4 Bitcast 101 102 59
5 InBoundsPtrAccessChain 101 103 102 100
5 Store 103 60 2 1
5 IAdd 6 99 100 104
5 ULessThan 36 106 99 61
4 BranchConditional 106 95 96

2 Label 96
1 Return

1 FunctionEnd

5 Function 2 65 0 57
3 FunctionParameter 55 66
3 FunctionParameter 7 67
3 FunctionParameter 6 68
3 FunctionParameter 36 69

2 Label 107
5 IEqual 36 110 97 68
4 BranchConditional 110 109 108

2 Label 108
7 Phi 6 112 97 107 111 108
4 Bitcast 101 113 66
5 InBoundsPtrAccessChain 101 114 113 112
5 Store 114 67 3 1
5 IAdd 6 111 112 104
5 ULessThan 36 116 111 68
4 BranchConditional 116 108 109

2 Label 109
1 Return

1 FunctionEnd

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