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[Scalarizer] Make *_with_overflow intrinsics scalarizable #126815

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Merged
merged 5 commits into from
Feb 13, 2025
Merged

[Scalarizer] Make *_with_overflow intrinsics scalarizable #126815

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1ee9014
Make uadd_with_overflow scalarizable
Icohedron Feb 11, 2025
e91e4c6
Add a test for an intrinsic that is not marked as isTriviallyScalariz…
Icohedron Feb 11, 2025
b2a128b
Make sadd, smul, ssub, umul, and usub trivially scalarizable
Icohedron Feb 12, 2025
0ecf77e
Remove unnecessary include from VectorUtils.cpp
Icohedron Feb 12, 2025
0d6eb29
Replace single quotes with double quotes so the update_test_checks.py…
Icohedron Feb 13, 2025
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1 change: 1 addition & 0 deletions llvm/lib/Analysis/VectorUtils.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -125,6 +125,7 @@ bool llvm::isTriviallyScalarizable(Intrinsic::ID ID,
// https://github.com/llvm/llvm-project/issues/112408
switch (ID) {
case Intrinsic::frexp:
case Intrinsic::uadd_with_overflow:
return true;
}
return false;
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17 changes: 17 additions & 0 deletions llvm/test/Transforms/Scalarizer/sincos.ll
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@@ -0,0 +1,17 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt %s -passes='function(scalarizer)' -S | FileCheck %s

; Test to make sure that struct return intrinsics that are not `isTriviallyScalarizable` do not get scalarized.

define <4 x float> @test_(<4 x float> %Val) {
; CHECK-LABEL: define <4 x float> @test_(
; CHECK-SAME: <4 x float> [[VAL:%.*]]) {
; CHECK-NEXT: [[R:%.*]] = call { <4 x float>, <4 x float> } @llvm.sincos.v4f32(<4 x float> [[VAL]])
; CHECK-NEXT: [[EL:%.*]] = extractvalue { <4 x float>, <4 x float> } [[R]], 0
; CHECK-NEXT: ret <4 x float> [[EL]]
;
%r = call { <4 x float>, <4 x float> } @llvm.sincos.v4f32(<4 x float> %Val)
%el = extractvalue { <4 x float>, <4 x float> } %r, 0
ret <4 x float> %el
}

16 changes: 12 additions & 4 deletions llvm/test/Transforms/Scalarizer/uadd_overflow.ll
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@@ -1,13 +1,21 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt %s -passes='function(scalarizer)' -S | FileCheck %s

; Test to make sure that struct return intrinsics that are not `isTriviallyScalarizable` do not get scalarized.

define <3 x i32> @test_(<3 x i32> %a, <3 x i32> %b) {
; CHECK-LABEL: define <3 x i32> @test_(
; CHECK-SAME: <3 x i32> [[A:%.*]], <3 x i32> [[B:%.*]]) {
; CHECK-NEXT: [[R:%.*]] = call { <3 x i32>, <3 x i1> } @llvm.uadd.with.overflow.v3i32(<3 x i32> [[B]], <3 x i32> [[B]])
; CHECK-NEXT: [[EL:%.*]] = extractvalue { <3 x i32>, <3 x i1> } [[R]], 0
; CHECK-NEXT: [[B_I0:%.*]] = extractelement <3 x i32> [[B]], i64 0
; CHECK-NEXT: [[R_I0:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[B_I0]], i32 [[B_I0]])
; CHECK-NEXT: [[B_I1:%.*]] = extractelement <3 x i32> [[B]], i64 1
; CHECK-NEXT: [[R_I1:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[B_I1]], i32 [[B_I1]])
; CHECK-NEXT: [[B_I2:%.*]] = extractelement <3 x i32> [[B]], i64 2
; CHECK-NEXT: [[R_I2:%.*]] = call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[B_I2]], i32 [[B_I2]])
; CHECK-NEXT: [[EL_ELEM0:%.*]] = extractvalue { i32, i1 } [[R_I0]], 0
; CHECK-NEXT: [[EL_ELEM01:%.*]] = extractvalue { i32, i1 } [[R_I1]], 0
; CHECK-NEXT: [[EL_ELEM02:%.*]] = extractvalue { i32, i1 } [[R_I2]], 0
; CHECK-NEXT: [[EL_UPTO0:%.*]] = insertelement <3 x i32> poison, i32 [[EL_ELEM0]], i64 0
; CHECK-NEXT: [[EL_UPTO1:%.*]] = insertelement <3 x i32> [[EL_UPTO0]], i32 [[EL_ELEM01]], i64 1
; CHECK-NEXT: [[EL:%.*]] = insertelement <3 x i32> [[EL_UPTO1]], i32 [[EL_ELEM02]], i64 2
; CHECK-NEXT: ret <3 x i32> [[EL]]
;
%r = call { <3 x i32>, <3 x i1> } @llvm.uadd.with.overflow.v3i32(<3 x i32> %b, <3 x i32> %b)
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