[llvm] 8356610 - [test] pre commit a couple more tests for vectorizing multiple exit loops
Philip Reames via llvm-commits
llvm-commits at lists.llvm.org
Sun Jan 17 20:30:08 PST 2021
Author: Philip Reames
Date: 2021-01-17T20:29:13-08:00
New Revision: 8356610f8d48ca7ecbb930dd9b987e4269784710
URL: https://github.com/llvm/llvm-project/commit/8356610f8d48ca7ecbb930dd9b987e4269784710
DIFF: https://github.com/llvm/llvm-project/commit/8356610f8d48ca7ecbb930dd9b987e4269784710.diff
LOG: [test] pre commit a couple more tests for vectorizing multiple exit loops
Added:
Modified:
llvm/test/Transforms/LoopVectorize/loop-form.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/LoopVectorize/loop-form.ll b/llvm/test/Transforms/LoopVectorize/loop-form.ll
index 5b2dd81a395b..91780789088b 100644
--- a/llvm/test/Transforms/LoopVectorize/loop-form.ll
+++ b/llvm/test/Transforms/LoopVectorize/loop-form.ll
@@ -588,6 +588,140 @@ if.end2:
ret i32 1
}
+; LCSSA, common value each exit
+define i32 @multiple_exit_blocks2(i16* %p, i32 %n) {
+; CHECK-LABEL: @multiple_exit_blocks2(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[FOR_COND:%.*]]
+; CHECK: for.cond:
+; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
+; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
+; CHECK-NEXT: store i16 0, i16* [[B]], align 4
+; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
+; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
+; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
+; CHECK: if.end:
+; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
+; CHECK-NEXT: ret i32 [[I_LCSSA]]
+; CHECK: if.end2:
+; CHECK-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ]
+; CHECK-NEXT: ret i32 [[I_LCSSA1]]
+;
+; TAILFOLD-LABEL: @multiple_exit_blocks2(
+; TAILFOLD-NEXT: entry:
+; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
+; TAILFOLD: for.cond:
+; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
+; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
+; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
+; TAILFOLD: for.body:
+; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
+; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
+; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
+; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
+; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
+; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
+; TAILFOLD: if.end:
+; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
+; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
+; TAILFOLD: if.end2:
+; TAILFOLD-NEXT: [[I_LCSSA1:%.*]] = phi i32 [ [[I]], [[FOR_BODY]] ]
+; TAILFOLD-NEXT: ret i32 [[I_LCSSA1]]
+;
+entry:
+ br label %for.cond
+
+for.cond:
+ %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ %cmp = icmp slt i32 %i, %n
+ br i1 %cmp, label %for.body, label %if.end
+
+for.body:
+ %iprom = sext i32 %i to i64
+ %b = getelementptr inbounds i16, i16* %p, i64 %iprom
+ store i16 0, i16* %b, align 4
+ %inc = add nsw i32 %i, 1
+ %cmp2 = icmp slt i32 %i, 2096
+ br i1 %cmp2, label %for.cond, label %if.end2
+
+if.end:
+ ret i32 %i
+
+if.end2:
+ ret i32 %i
+}
+
+; LCSSA, distinct value each exit
+define i32 @multiple_exit_blocks3(i16* %p, i32 %n) {
+; CHECK-LABEL: @multiple_exit_blocks3(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[FOR_COND:%.*]]
+; CHECK: for.cond:
+; CHECK-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
+; CHECK-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
+; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
+; CHECK: for.body:
+; CHECK-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
+; CHECK-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
+; CHECK-NEXT: store i16 0, i16* [[B]], align 4
+; CHECK-NEXT: [[INC]] = add nsw i32 [[I]], 1
+; CHECK-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
+; CHECK-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
+; CHECK: if.end:
+; CHECK-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
+; CHECK-NEXT: ret i32 [[I_LCSSA]]
+; CHECK: if.end2:
+; CHECK-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
+; CHECK-NEXT: ret i32 [[INC_LCSSA]]
+;
+; TAILFOLD-LABEL: @multiple_exit_blocks3(
+; TAILFOLD-NEXT: entry:
+; TAILFOLD-NEXT: br label [[FOR_COND:%.*]]
+; TAILFOLD: for.cond:
+; TAILFOLD-NEXT: [[I:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
+; TAILFOLD-NEXT: [[CMP:%.*]] = icmp slt i32 [[I]], [[N:%.*]]
+; TAILFOLD-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[IF_END:%.*]]
+; TAILFOLD: for.body:
+; TAILFOLD-NEXT: [[IPROM:%.*]] = sext i32 [[I]] to i64
+; TAILFOLD-NEXT: [[B:%.*]] = getelementptr inbounds i16, i16* [[P:%.*]], i64 [[IPROM]]
+; TAILFOLD-NEXT: store i16 0, i16* [[B]], align 4
+; TAILFOLD-NEXT: [[INC]] = add nsw i32 [[I]], 1
+; TAILFOLD-NEXT: [[CMP2:%.*]] = icmp slt i32 [[I]], 2096
+; TAILFOLD-NEXT: br i1 [[CMP2]], label [[FOR_COND]], label [[IF_END2:%.*]]
+; TAILFOLD: if.end:
+; TAILFOLD-NEXT: [[I_LCSSA:%.*]] = phi i32 [ [[I]], [[FOR_COND]] ]
+; TAILFOLD-NEXT: ret i32 [[I_LCSSA]]
+; TAILFOLD: if.end2:
+; TAILFOLD-NEXT: [[INC_LCSSA:%.*]] = phi i32 [ [[INC]], [[FOR_BODY]] ]
+; TAILFOLD-NEXT: ret i32 [[INC_LCSSA]]
+;
+entry:
+ br label %for.cond
+
+for.cond:
+ %i = phi i32 [ 0, %entry ], [ %inc, %for.body ]
+ %cmp = icmp slt i32 %i, %n
+ br i1 %cmp, label %for.body, label %if.end
+
+for.body:
+ %iprom = sext i32 %i to i64
+ %b = getelementptr inbounds i16, i16* %p, i64 %iprom
+ store i16 0, i16* %b, align 4
+ %inc = add nsw i32 %i, 1
+ %cmp2 = icmp slt i32 %i, 2096
+ br i1 %cmp2, label %for.cond, label %if.end2
+
+if.end:
+ ret i32 %i
+
+if.end2:
+ ret i32 %inc
+}
+
; unique exit case but with a switch as two edges between the same pair of
; blocks is an often missed edge case
define i32 @multiple_exit_switch(i16* %p, i32 %n) {
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