[llvm] [InferAttrs] Set attributes for `remainder` (PR #99521)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-llvm-transforms

Author: Yingwei Zheng (dtcxzyw)

<details>
<summary>Changes</summary>

Fixes one of the issues in https://github.com/llvm/llvm-project/issues/99497.


---
Full diff: https://github.com/llvm/llvm-project/pull/99521.diff


2 Files Affected:

- (modified) llvm/lib/Transforms/Utils/BuildLibCalls.cpp (+3) 
- (modified) llvm/test/Transforms/InferFunctionAttrs/annotate.ll (+9) 


``````````diff
diff --git a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
index e97506b4bbd95..1ced3657184d4 100644
--- a/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/llvm/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -1195,6 +1195,9 @@ bool llvm::inferNonMandatoryLibFuncAttrs(Function &F,
   case LibFunc_pow:
   case LibFunc_powf:
   case LibFunc_powl:
+  case LibFunc_remainder:
+  case LibFunc_remainderf:
+  case LibFunc_remainderl:
   case LibFunc_rint:
   case LibFunc_rintf:
   case LibFunc_rintl:
diff --git a/llvm/test/Transforms/InferFunctionAttrs/annotate.ll b/llvm/test/Transforms/InferFunctionAttrs/annotate.ll
index 456155d7e4437..0944402a91fd0 100644
--- a/llvm/test/Transforms/InferFunctionAttrs/annotate.ll
+++ b/llvm/test/Transforms/InferFunctionAttrs/annotate.ll
@@ -800,6 +800,15 @@ declare ptr @vec_realloc(ptr, i64)
 ; CHECK: declare noundef ptr @realpath(ptr nocapture noundef readonly, ptr noundef) [[NOFREE_NOUNWIND]]
 declare ptr @realpath(ptr, ptr)
 
+; CHECK: declare double @remainder(double, double) [[NOFREE_NOUNWIND_WILLRETURN_WRITEONLY]]
+declare double @remainder(double, double)
+
+; CHECK: declare float @remainderf(float, float) [[NOFREE_NOUNWIND_WILLRETURN_WRITEONLY]]
+declare float @remainderf(float, float)
+
+; CHECK: declare x86_fp80 @remainderl(x86_fp80, x86_fp80) [[NOFREE_NOUNWIND_WILLRETURN_WRITEONLY]]
+declare x86_fp80 @remainderl(x86_fp80, x86_fp80)
+
 ; CHECK: declare noundef i32 @remove(ptr nocapture noundef readonly) [[NOFREE_NOUNWIND]]
 declare i32 @remove(ptr)
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/99521