[llvm] bdf2547 - [JumpThreading] Add additional freeze tests (NFC)
Nikita Popov via llvm-commits
llvm-commits at lists.llvm.org
Wed May 18 03:03:41 PDT 2022
Author: Nikita Popov
Date: 2022-05-18T12:03:15+02:00
New Revision: bdf25477f6f24621ceba2fb0a8ff1e7c0e181144
URL: https://github.com/llvm/llvm-project/commit/bdf25477f6f24621ceba2fb0a8ff1e7c0e181144
DIFF: https://github.com/llvm/llvm-project/commit/bdf25477f6f24621ceba2fb0a8ff1e7c0e181144.diff
LOG: [JumpThreading] Add additional freeze tests (NFC)
These are for the getPredicateAt() codepath.
Added:
Modified:
llvm/test/Transforms/JumpThreading/freeze.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/JumpThreading/freeze.ll b/llvm/test/Transforms/JumpThreading/freeze.ll
index 650cbeb2205d..5df03c1790a2 100644
--- a/llvm/test/Transforms/JumpThreading/freeze.ll
+++ b/llvm/test/Transforms/JumpThreading/freeze.ll
@@ -189,3 +189,65 @@ T2:
F2:
ret i32 %B
}
+
+define i32 @freeze_known_predicate(i1 %cond) {
+; CHECK-LABEL: @freeze_known_predicate(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[ELSE2:%.*]]
+; CHECK: if:
+; CHECK-NEXT: br label [[ELSE2]]
+; CHECK: else2:
+; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ 1, [[IF]] ], [ 2, [[ENTRY:%.*]] ]
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[PHI]], 0
+; CHECK-NEXT: ret i32 1
+;
+entry:
+ br i1 %cond, label %if, label %join
+
+if:
+ br label %join
+
+join:
+ %phi = phi i32 [ 1, %if ], [ 2, %entry ]
+ %cmp = icmp eq i32 %phi, 0
+ %cmp.fr = freeze i1 %cmp
+ br i1 %cmp.fr, label %if2, label %else2
+
+if2:
+ ret i32 0
+
+else2:
+ ret i32 1
+}
+
+define i32 @freeze_known_predicate_barrier(i1 %cond) {
+; CHECK-LABEL: @freeze_known_predicate_barrier(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 [[COND:%.*]], label [[IF:%.*]], label [[ELSE2:%.*]]
+; CHECK: if:
+; CHECK-NEXT: br label [[ELSE2]]
+; CHECK: else2:
+; CHECK-NEXT: [[PHI:%.*]] = phi i32 [ 1, [[IF]] ], [ 2, [[ENTRY:%.*]] ]
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[PHI]], 0
+; CHECK-NEXT: [[TMP0:%.*]] = call i32 @f1()
+; CHECK-NEXT: ret i32 1
+;
+entry:
+ br i1 %cond, label %if, label %join
+
+if:
+ br label %join
+
+join:
+ %phi = phi i32 [ 1, %if ], [ 2, %entry ]
+ %cmp = icmp eq i32 %phi, 0
+ %cmp.fr = freeze i1 %cmp
+ call i32 @f1()
+ br i1 %cmp.fr, label %if2, label %else2
+
+if2:
+ ret i32 0
+
+else2:
+ ret i32 1
+}
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