[llvm] [X86][GlobalIsel] Support G_INTRINSIC_TRUNC/G_FCEIL/G_FFLOOR (PR #156317)

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llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-backend-x86

Author: Mahesh-Attarde (mahesh-attarde)

<details>
<summary>Changes</summary>

This PR adds support for C/CPP Lib Intrinsic from LangRef in GlobalIsel.
Test is added https://github.com/llvm/llvm-project/pull/156281


---
Full diff: https://github.com/llvm/llvm-project/pull/156317.diff


1 Files Affected:

- (modified) llvm/lib/Target/X86/GISel/X86LegalizerInfo.cpp (+2-1) 


``````````diff
diff --git a/llvm/lib/Target/X86/GISel/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/GISel/X86LegalizerInfo.cpp
index 7fe58539cd4ec..c27e6075c779f 100644
--- a/llvm/lib/Target/X86/GISel/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/GISel/X86LegalizerInfo.cpp
@@ -580,7 +580,8 @@ X86LegalizerInfo::X86LegalizerInfo(const X86Subtarget &STI,
       .lower();
 
   // fp intrinsics
-  getActionDefinitionsBuilder(G_INTRINSIC_ROUNDEVEN)
+  getActionDefinitionsBuilder(
+      {G_INTRINSIC_ROUNDEVEN, G_INTRINSIC_TRUNC, G_FCEIL, G_FFLOOR})
       .scalarize(0)
       .minScalar(0, LLT::scalar(32))
       .libcall();

``````````

</details>


https://github.com/llvm/llvm-project/pull/156317