[llvm] 7eeb468 - [Aarch64] Add cost for missing extensions.

[via llvm-commits]

Author: chendewen
Date: 2022-07-28T17:34:00+08:00
New Revision: 7eeb468ae5e5a97f96a4a3348f66adcb2b0b8e8d

URL: https://github.com/llvm/llvm-project/commit/7eeb468ae5e5a97f96a4a3348f66adcb2b0b8e8d
DIFF: https://github.com/llvm/llvm-project/commit/7eeb468ae5e5a97f96a4a3348f66adcb2b0b8e8d.diff

LOG: [Aarch64] Add cost for missing extensions.

This patch adds a cost estimate for some missing sign extensions.
ref: https://reviews.llvm.org/D14730

Reviewed By: dmgreen

Differential Revision: https://reviews.llvm.org/D130565

Added: 
    

Modified: 
    llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
    llvm/test/Analysis/CostModel/AArch64/cast.ll

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
index 66617393c9aeb..5cfa479b606c9 100644
--- a/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
+++ b/llvm/lib/Target/AArch64/AArch64TargetTransformInfo.cpp
@@ -1683,6 +1683,9 @@ InstructionCost AArch64TTIImpl::getCastInstrCost(unsigned Opcode, Type *Dst,
     { ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i16, 4 },
     { ISD::UINT_TO_FP, MVT::v2f64, MVT::v2i32, 2 },
 
+    // Complex: to v4f64
+    { ISD::SINT_TO_FP, MVT::v4f64, MVT::v4i32,  4 },
+    { ISD::UINT_TO_FP, MVT::v4f64, MVT::v4i32,  4 },
 
     // LowerVectorFP_TO_INT
     { ISD::FP_TO_SINT, MVT::v2i32, MVT::v2f32, 1 },

diff  --git a/llvm/test/Analysis/CostModel/AArch64/cast.ll b/llvm/test/Analysis/CostModel/AArch64/cast.ll
index 44d5cc253bddc..c735ed8557ecc 100644
--- a/llvm/test/Analysis/CostModel/AArch64/cast.ll
+++ b/llvm/test/Analysis/CostModel/AArch64/cast.ll
@@ -396,8 +396,8 @@ define i32 @casts_no_users() {
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r203 = sitofp <4 x i8> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r204 = uitofp <4 x i16> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 9 for instruction: %r205 = sitofp <4 x i16> undef to <4 x double>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 5 for instruction: %r206 = uitofp <4 x i32> undef to <4 x double>
-; CHECK-NEXT:  Cost Model: Found an estimated cost of 5 for instruction: %r207 = sitofp <4 x i32> undef to <4 x double>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %r206 = uitofp <4 x i32> undef to <4 x double>
+; CHECK-NEXT:  Cost Model: Found an estimated cost of 4 for instruction: %r207 = sitofp <4 x i32> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %r208 = uitofp <4 x i64> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %r209 = sitofp <4 x i64> undef to <4 x double>
 ; CHECK-NEXT:  Cost Model: Found an estimated cost of 3 for instruction: %r210 = uitofp <8 x i1> undef to <8 x float>