[PATCH] D156152: LoopVectorize/iv-select-cmp: add test for decreasing IV, const start
Ramkumar Ramachandra via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Tue Jul 25 07:43:22 PDT 2023
artagnon updated this revision to Diff 543973.
artagnon added a comment.
Remove noundef in argument.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D156152/new/
https://reviews.llvm.org/D156152
Files:
llvm/test/Transforms/LoopVectorize/iv-select-cmp.ll
Index: llvm/test/Transforms/LoopVectorize/iv-select-cmp.ll
===================================================================
--- llvm/test/Transforms/LoopVectorize/iv-select-cmp.ll
+++ llvm/test/Transforms/LoopVectorize/iv-select-cmp.ll
@@ -214,8 +214,29 @@
ret float %cond
}
-define i64 @not_vectorized_select_decreasing_induction_icmp(ptr nocapture readonly %a, ptr nocapture readonly %b, i64 %rdx.start, i64 %n) {
-; CHECK-LABEL: @not_vectorized_select_decreasing_induction_icmp
+define i64 @not_vectorized_select_decreasing_induction_icmp_const_start(ptr nocapture readonly %a) {
+; CHECK-LABEL: @not_vectorized_select_decreasing_induction_icmp_const_start
+; CHECK-NOT: vector.body:
+entry:
+ br label %for.body
+
+for.body: ; preds = %entry, %for.body
+ %iv = phi i64 [ 19999, %entry ], [ %dec, %for.body ]
+ %rdx = phi i64 [ 331, %entry ], [ %spec.select, %for.body ]
+ %arrayidx = getelementptr inbounds i64, ptr %a, i64 %iv
+ %0 = load i64, ptr %arrayidx, align 8
+ %cmp = icmp sgt i64 %0, 3
+ %spec.select = select i1 %cmp, i64 %iv, i64 %rdx
+ %dec = add nsw i64 %iv, -1
+ %cmp.not = icmp eq i64 %iv, 0
+ br i1 %cmp.not, label %exit, label %for.body
+
+exit: ; preds = %for.body
+ ret i64 %spec.select
+}
+
+define i64 @not_vectorized_select_decreasing_induction_icmp_non_const_start(ptr nocapture readonly %a, ptr nocapture readonly %b, i64 %rdx.start, i64 %n) {
+; CHECK-LABEL: @not_vectorized_select_decreasing_induction_icmp_non_const_start
; CHECK-NOT: vector.body:
;
entry:
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