[llvm] 4549a8d - [InstCombine] Add additional tests for select of phi transform (NFC)
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Mon Aug 26 03:02:12 PDT 2024
Author: Nikita Popov
Date: 2024-08-26T12:02:02+02:00
New Revision: 4549a8d251cfa91cc6230139595f0b7efdf199d9
URL: https://github.com/llvm/llvm-project/commit/4549a8d251cfa91cc6230139595f0b7efdf199d9
DIFF: https://github.com/llvm/llvm-project/commit/4549a8d251cfa91cc6230139595f0b7efdf199d9.diff
LOG: [InstCombine] Add additional tests for select of phi transform (NFC)
Test coverage for the canSelectOperandBeMappingIntoPredBlock()
logic.
Added:
Modified:
llvm/test/Transforms/InstCombine/phi-select-constant.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/phi-select-constant.ll b/llvm/test/Transforms/InstCombine/phi-select-constant.ll
index dbe61c42eec6f8..9d61891127690c 100644
--- a/llvm/test/Transforms/InstCombine/phi-select-constant.ll
+++ b/llvm/test/Transforms/InstCombine/phi-select-constant.ll
@@ -195,3 +195,89 @@ join:
%sel = select i1 %phi1, i32 %phi2, i32 %phi3
ret i32 %sel
}
+
+define i32 @dominating_values_select_same_block(i1 %c1, i1 %c2, ptr %p, ptr %p2) {
+; CHECK-LABEL: @dominating_values_select_same_block(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[B:%.*]] = load i32, ptr [[P2:%.*]], align 4
+; CHECK-NEXT: br i1 [[C1:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
+; CHECK: delay:
+; CHECK-NEXT: [[A:%.*]] = load i32, ptr [[P:%.*]], align 4
+; CHECK-NEXT: [[TMP0:%.*]] = select i1 [[C2:%.*]], i32 [[A]], i32 [[B]]
+; CHECK-NEXT: br label [[FINAL]]
+; CHECK: final:
+; CHECK-NEXT: [[USE2:%.*]] = phi i32 [ [[B]], [[ENTRY:%.*]] ], [ [[TMP0]], [[DELAY]] ]
+; CHECK-NEXT: ret i32 [[USE2]]
+;
+entry:
+ %a = load i32, ptr %p
+ %b = load i32, ptr %p2
+ br i1 %c1, label %final, label %delay
+
+delay:
+ br label %final
+
+final:
+ %use2 = phi i1 [ false, %entry ], [ %c2, %delay ]
+ %value = select i1 %use2, i32 %a, i32 %b
+ ret i32 %value
+}
+
+define i32 @dominating_values_select_not_same_block(i1 %c1, i1 %c2, ptr %p, ptr %p2) {
+; CHECK-LABEL: @dominating_values_select_not_same_block(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, ptr [[P:%.*]], align 4
+; CHECK-NEXT: [[B:%.*]] = load i32, ptr [[P2:%.*]], align 4
+; CHECK-NEXT: br i1 [[C1:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
+; CHECK: delay:
+; CHECK-NEXT: br label [[FINAL]]
+; CHECK: final:
+; CHECK-NEXT: [[USE2:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[C2:%.*]], [[DELAY]] ]
+; CHECK-NEXT: br label [[SPLIT:%.*]]
+; CHECK: split:
+; CHECK-NEXT: [[VALUE:%.*]] = select i1 [[USE2]], i32 [[A]], i32 [[B]]
+; CHECK-NEXT: ret i32 [[VALUE]]
+;
+entry:
+ %a = load i32, ptr %p
+ %b = load i32, ptr %p2
+ br i1 %c1, label %final, label %delay
+
+delay:
+ br label %final
+
+final:
+ %use2 = phi i1 [ false, %entry ], [ %c2, %delay ]
+ br label %split
+
+split:
+ %value = select i1 %use2, i32 %a, i32 %b
+ ret i32 %value
+}
+
+define i32 @not_dominating_values(i1 %c1, i1 %c2, ptr %p, ptr %p2) {
+; CHECK-LABEL: @not_dominating_values(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, ptr [[P:%.*]], align 4
+; CHECK-NEXT: br i1 [[C1:%.*]], label [[FINAL:%.*]], label [[DELAY:%.*]]
+; CHECK: delay:
+; CHECK-NEXT: br label [[FINAL]]
+; CHECK: final:
+; CHECK-NEXT: [[USE2:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[C2:%.*]], [[DELAY]] ]
+; CHECK-NEXT: [[B:%.*]] = load i32, ptr [[P2:%.*]], align 4
+; CHECK-NEXT: [[VALUE:%.*]] = select i1 [[USE2]], i32 [[A]], i32 [[B]]
+; CHECK-NEXT: ret i32 [[VALUE]]
+;
+entry:
+ %a = load i32, ptr %p
+ br i1 %c1, label %final, label %delay
+
+delay:
+ br label %final
+
+final:
+ %use2 = phi i1 [ false, %entry ], [ %c2, %delay ]
+ %b = load i32, ptr %p2
+ %value = select i1 %use2, i32 %a, i32 %b
+ ret i32 %value
+}
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