llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-backend-x86 Author: None (llvmbot) <details> <summary>Changes</summary> Backport 8c222c122f1a8edb1be96e482511ad547f7db7b3 Requested by: @<!-- -->phoebewang --- Full diff: https://github.com/llvm/llvm-project/pull/125995.diff 2 Files Affected: - (modified) llvm/lib/Target/X86/X86ISelLowering.cpp (-5) - (modified) llvm/test/CodeGen/X86/lrint-conv-i64.ll (+18) ``````````diff diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp index 8f904209d8a3ad9..627cef9ead7ffac 100644 --- a/llvm/lib/Target/X86/X86ISelLowering.cpp +++ b/llvm/lib/Target/X86/X86ISelLowering.cpp @@ -53899,11 +53899,6 @@ static SDValue combineTruncate(SDNode *N, SelectionDAG &DAG, return DAG.getNode(X86ISD::MMX_MOVD2W, DL, MVT::i32, BCSrc); } - // Try to combine (trunc (vNi64 (lrint x))) to (vNi32 (lrint x)). - if (Src.getOpcode() == ISD::LRINT && VT.getScalarType() == MVT::i32 && - Src.hasOneUse()) - return DAG.getNode(ISD::LRINT, DL, VT, Src.getOperand(0)); - return SDValue(); } diff --git a/llvm/test/CodeGen/X86/lrint-conv-i64.ll b/llvm/test/CodeGen/X86/lrint-conv-i64.ll index 01b0af2f807f200..38fa09085e1898d 100644 --- a/llvm/test/CodeGen/X86/lrint-conv-i64.ll +++ b/llvm/test/CodeGen/X86/lrint-conv-i64.ll @@ -45,6 +45,24 @@ entry: ret i64 %0 } +define i32 @PR125324(float %x) { +; SSE-LABEL: PR125324: +; SSE: # %bb.0: # %entry +; SSE-NEXT: cvtss2si %xmm0, %rax +; SSE-NEXT: # kill: def $eax killed $eax killed $rax +; SSE-NEXT: retq +; +; AVX-LABEL: PR125324: +; AVX: # %bb.0: # %entry +; AVX-NEXT: vcvtss2si %xmm0, %rax +; AVX-NEXT: # kill: def $eax killed $eax killed $rax +; AVX-NEXT: retq +entry: + %0 = tail call i64 @llvm.lrint.i64.f32(float %x) + %1 = trunc i64 %0 to i32 + ret i32 %1 +} + declare i64 @llvm.lrint.i64.f32(float) nounwind readnone declare i64 @llvm.lrint.i64.f64(double) nounwind readnone declare i64 @llvm.lrint.i64.f80(x86_fp80) nounwind readnone `````````` </details> https://github.com/llvm/llvm-project/pull/125995 _______________________________________________ llvm-branch-commits mailing list llvm-branch-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
