================
@@ -0,0 +1,62 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
UTC_ARGS: --check-globals --version 2
+; RUN: opt < %s -passes='simplifycfg<no-sink-common-insts;hoist-common-insts>'
-simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
--check-prefix=HOIST
+
+; Test case based on C++ code with manualy annotated !prof metadata.
+; This is to test that when calls to 'func1' from 'if.then' block
+; and 'if.else' block are hoisted, the branch_weights are merged and
+; attached to merged call rather than dropped.
+;
+; int func1(int a, int b) ;
+; int func2(int a, int b) ;
+
+; int func(int a, int b, bool c) {
+; int sum= 0;
+; if(c) {
+; sum += func1(a, b);
+; } else {
+; sum += func1(a, b);
+; sum -= func2(a, b);
+; }
+; return sum;
+; }
+define i32 @_Z4funciib(i32 %a, i32 %b, i1 %c) {
+; HOIST-LABEL: define i32 @_Z4funciib
+; HOIST-SAME: (i32 [[A:%.*]], i32 [[B:%.*]], i1 [[C:%.*]]) {
+; HOIST-NEXT: entry:
+; HOIST-NEXT: [[CALL:%.*]] = tail call i32 @_Z5func1ii(i32 [[A]], i32
[[B]]), !prof [[PROF0:![0-9]+]]
+; HOIST-NEXT: br i1 [[C]], label [[IF_END:%.*]], label [[IF_ELSE:%.*]]
+; HOIST: if.else:
+; HOIST-NEXT: [[CALL3:%.*]] = tail call i32 @_Z5func2ii(i32 [[A]], i32
[[B]])
+; HOIST-NEXT: [[SUB:%.*]] = sub i32 [[CALL]], [[CALL3]]
+; HOIST-NEXT: br label [[IF_END]]
+; HOIST: if.end:
+; HOIST-NEXT: [[SUM_0:%.*]] = phi i32 [ [[SUB]], [[IF_ELSE]] ], [ [[CALL]],
[[ENTRY:%.*]] ]
+; HOIST-NEXT: ret i32 [[SUM_0]]
+;
+entry:
+ br i1 %c, label %if.then, label %if.else
+
+if.then: ; preds = %entry
+ %call = tail call i32 @_Z5func1ii(i32 %a, i32 %b), !prof !0
+ br label %if.end
+
+if.else: ; preds = %entry
+ %call1 = tail call i32 @_Z5func1ii(i32 %a, i32 %b)
+ %call3 = tail call i32 @_Z5func2ii(i32 %a, i32 %b)
+ %sub = sub i32 %call1, %call3
+ br label %if.end
+
+if.end: ; preds = %if.else, %if.then
+ %sum.0 = phi i32 [ %call, %if.then ], [ %sub, %if.else ]
+ ret i32 %sum.0
+}
+
+declare i32 @_Z5func1ii(i32, i32)
+
+declare i32 @_Z5func2ii(i32, i32)
+
+!0 = !{!"branch_weights", i32 10}
+!1 = !{!"branch_weights", i32 90}
----------------
snehasish wrote:
Removed.
https://github.com/llvm/llvm-project/pull/132433
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