[llvm] 3ff7892 - [SLP] Add test case showing missing CSE in hoisted instructions.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Sat Sep 10 12:55:38 PDT 2022
Author: Florian Hahn
Date: 2022-09-10T20:55:04+01:00
New Revision: 3ff78920053be7e2b15ee9735d1b80e4d742e67c
URL: https://github.com/llvm/llvm-project/commit/3ff78920053be7e2b15ee9735d1b80e4d742e67c
DIFF: https://github.com/llvm/llvm-project/commit/3ff78920053be7e2b15ee9735d1b80e4d742e67c.diff
LOG: [SLP] Add test case showing missing CSE in hoisted instructions.
Added:
Modified:
llvm/test/Transforms/SLPVectorizer/X86/cse.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/SLPVectorizer/X86/cse.ll b/llvm/test/Transforms/SLPVectorizer/X86/cse.ll
index 017025ca3c43..77c8f8c26067 100644
--- a/llvm/test/Transforms/SLPVectorizer/X86/cse.ll
+++ b/llvm/test/Transforms/SLPVectorizer/X86/cse.ll
@@ -347,3 +347,49 @@ if.end13: ; preds = %if.then12, %sw.epil
%b.0 = phi double [ %3, %if.then12 ], [ %add10, %sw.epilog7 ], [ undef, %entry], [ undef, %entry ]
unreachable
}
+
+define void @cse_for_hoisted_instructions_in_preheader(i32* %dst, i32 %a, i1 %c) {
+; CHECK-LABEL: @cse_for_hoisted_instructions_in_preheader(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TMP0:%.*]] = insertelement <2 x i32> poison, i32 [[A:%.*]], i32 0
+; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x i32> [[TMP0]], i32 [[A]], i32 1
+; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x i32> poison, i32 [[A]], i32 0
+; CHECK-NEXT: [[TMP3:%.*]] = insertelement <2 x i32> [[TMP2]], i32 [[A]], i32 1
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[TMP4:%.*]] = or <2 x i32> <i32 22, i32 22>, [[TMP1]]
+; CHECK-NEXT: [[GEP_0:%.*]] = getelementptr inbounds i32, i32* [[DST:%.*]], i64 0
+; CHECK-NEXT: [[TMP5:%.*]] = or <2 x i32> [[TMP4]], <i32 3, i32 3>
+; CHECK-NEXT: [[TMP6:%.*]] = bitcast i32* [[GEP_0]] to <2 x i32>*
+; CHECK-NEXT: store <2 x i32> [[TMP5]], <2 x i32>* [[TMP6]], align 4
+; CHECK-NEXT: [[TMP7:%.*]] = or <2 x i32> [[TMP3]], <i32 3, i32 3>
+; CHECK-NEXT: [[GEP_2:%.*]] = getelementptr inbounds i32, i32* [[DST]], i64 10
+; CHECK-NEXT: [[TMP8:%.*]] = bitcast i32* [[GEP_2]] to <2 x i32>*
+; CHECK-NEXT: store <2 x i32> [[TMP7]], <2 x i32>* [[TMP8]], align 4
+; CHECK-NEXT: br i1 [[C:%.*]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
+entry:
+ br label %loop
+
+loop:
+ %or.a = or i32 22, %a
+ %or.0 = or i32 %or.a, 3
+ %gep.0 = getelementptr inbounds i32, i32* %dst, i64 0
+ store i32 %or.0, i32* %gep.0
+ %or.a.2 = or i32 22, %a
+ %or.1 = or i32 %or.a.2, 3
+ %gep.1 = getelementptr inbounds i32, i32* %dst, i64 1
+ store i32 %or.1, i32* %gep.1
+ %or.2 = or i32 %a, 3
+ %gep.2 = getelementptr inbounds i32, i32* %dst, i64 10
+ store i32 %or.2, i32* %gep.2
+ %or.3 = or i32 %a, 3
+ %gep.3 = getelementptr inbounds i32, i32* %dst, i64 11
+ store i32 %or.3, i32* %gep.3
+ br i1 %c, label %loop, label %exit
+
+exit:
+ ret void
+}
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