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[C API] Add support for setting/getting new nneg flag on zext instructions (#73592)

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This flag was added in #67982, but was not yet accessible via the C API.
This commit adds a getter/setter for this flag, and a test for it.
This commit is contained in:
Benji Smith 2023-11-29 10:50:29 -05:00 committed by GitHub
parent 8aeacebf28
commit fad77dce51
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GPG Key ID: 4AEE18F83AFDEB23
5 changed files with 34 additions and 0 deletions
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3
llvm/docs/ReleaseNotes.rst
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@ -199,6 +199,9 @@ Changes to the C API
The option structure exposes an additional setting (i.e., the target ABI) and
provides default values for unspecified settings.
* Added ``LLVMGetNNeg`` and ``LLVMSetNNeg`` for setting/getting the new nneg flag
on zext instructions
Changes to the CodeGen infrastructure
-------------------------------------

11
llvm/include/llvm-c/Core.h
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@ -3974,6 +3974,17 @@ void LLVMSetNSW(LLVMValueRef ArithInst, LLVMBool HasNSW);
LLVMBool LLVMGetExact(LLVMValueRef DivOrShrInst);
void LLVMSetExact(LLVMValueRef DivOrShrInst, LLVMBool IsExact);
/**
* Gets if the instruction has the non-negative flag set
* Only valid for zext instructions
*/
LLVMBool LLVMGetNNeg(LLVMValueRef NonNegInst);
/**
* Sets the non-negative flag for the instruction
* Only valid for zext instructions
*/
void LLVMSetNNeg(LLVMValueRef NonNegInst, LLVMBool IsNonNeg);
/* Memory */
LLVMValueRef LLVMBuildMalloc(LLVMBuilderRef, LLVMTypeRef Ty, const char *Name);
LLVMValueRef LLVMBuildArrayMalloc(LLVMBuilderRef, LLVMTypeRef Ty,

10
llvm/lib/IR/Core.cpp
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@ -3454,6 +3454,16 @@ void LLVMSetExact(LLVMValueRef DivOrShrInst, LLVMBool IsExact) {
cast<Instruction>(P)->setIsExact(IsExact);
}
LLVMBool LLVMGetNNeg(LLVMValueRef NonNegInst) {
Value *P = unwrap<Value>(NonNegInst);
return cast<Instruction>(P)->hasNonNeg();
}
void LLVMSetNNeg(LLVMValueRef NonNegInst, LLVMBool IsNonNeg) {
Value *P = unwrap<Value>(NonNegInst);
cast<Instruction>(P)->setNonNeg(IsNonNeg);
}
/*--.. Memory ..............................................................--*/
LLVMValueRef LLVMBuildMalloc(LLVMBuilderRef B, LLVMTypeRef Ty,

2
llvm/test/Bindings/llvm-c/echo.ll
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@ -90,6 +90,8 @@ define i32 @iops(i32 %a, i32 %b) {
%21 = sdiv exact i32 %20, %2
%22 = lshr exact i32 %21, %4
%23 = ashr exact i32 %22, %14
%24 = zext i32 %23 to i64
%25 = zext nneg i32 %23 to i64
ret i32 %23
}

8
llvm/tools/llvm-c-test/echo.cpp
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@ -899,6 +899,14 @@ struct FunCloner {
Dst = LLVMBuildFence(Builder, Ordering, IsSingleThreaded, Name);
break;
}
case LLVMZExt: {
LLVMValueRef Val = CloneValue(LLVMGetOperand(Src, 0));
LLVMTypeRef DestTy = CloneType(LLVMTypeOf(Src));
LLVMBool NNeg = LLVMGetNNeg(Src);
Dst = LLVMBuildZExt(Builder, Val, DestTy, Name);
LLVMSetNNeg(Dst, NNeg);
break;
}
default:
break;
}