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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; then metadata checks MDn were added manually.
; RUN: opt -passes='loop(simple-loop-unswitch),verify<loops>' -S < %s | FileCheck %s
; RUN: opt -verify-memoryssa -passes='loop-mssa(simple-loop-unswitch),verify<loops>' -S < %s | FileCheck %s
declare void @some_func()
; Test for a trivially unswitchable switch with non-default case exiting.
define i32 @test2(ptr %var, i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[COND2:%.*]], label [[ENTRY_SPLIT:%.*]] [
; CHECK-NEXT: i32 2, label [[LOOP_EXIT2:%.*]]
; CHECK-NEXT: ], !prof ![[MD0:[0-9]+]]
; CHECK: entry.split:
; CHECK-NEXT: br label [[LOOP_BEGIN:%.*]]
; CHECK: loop_begin:
; CHECK-NEXT: [[VAR_VAL:%.*]] = load i32, ptr [[VAR:%.*]]
; CHECK-NEXT: switch i32 [[COND2]], label [[LOOP2:%.*]] [
; CHECK-NEXT: i32 0, label [[LOOP0:%.*]]
; CHECK-NEXT: i32 1, label [[LOOP1:%.*]]
; CHECK-NEXT: ], !prof ![[MD1:[0-9]+]]
; CHECK: loop0:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH:%.*]]
; CHECK: loop1:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop2:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop_latch:
; CHECK-NEXT: br label [[LOOP_BEGIN]]
; CHECK: loop_exit1:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit2:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit3:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop_begin
loop_begin:
%var_val = load i32, ptr %var
switch i32 %cond2, label %loop2 [
i32 0, label %loop0
i32 1, label %loop1
i32 2, label %loop_exit2
], !prof !{!"branch_weights", i32 99, i32 100, i32 101, i32 102}
loop0:
call void @some_func()
br label %loop_latch
loop1:
call void @some_func()
br label %loop_latch
loop2:
call void @some_func()
br label %loop_latch
loop_latch:
br label %loop_begin
loop_exit1:
ret i32 0
loop_exit2:
ret i32 0
loop_exit3:
ret i32 0
}
; Test for a trivially unswitchable switch with only the default case exiting.
define i32 @test3(ptr %var, i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[COND2:%.*]], label [[LOOP_EXIT2:%.*]] [
; CHECK-NEXT: i32 0, label [[ENTRY_SPLIT:%.*]]
; CHECK-NEXT: i32 1, label [[ENTRY_SPLIT]]
; CHECK-NEXT: i32 2, label [[ENTRY_SPLIT]]
; CHECK-NEXT: ], !prof ![[MD2:[0-9]+]]
; CHECK: entry.split:
; CHECK-NEXT: br label [[LOOP_BEGIN:%.*]]
; CHECK: loop_begin:
; CHECK-NEXT: [[VAR_VAL:%.*]] = load i32, ptr [[VAR:%.*]]
; CHECK-NEXT: switch i32 [[COND2]], label [[LOOP2:%.*]] [
; CHECK-NEXT: i32 0, label [[LOOP0:%.*]]
; CHECK-NEXT: i32 1, label [[LOOP1:%.*]]
; CHECK-NEXT: ], !prof ![[MD3:[0-9]+]]
; CHECK: loop0:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH:%.*]]
; CHECK: loop1:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop2:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop_latch:
; CHECK-NEXT: br label [[LOOP_BEGIN]]
; CHECK: loop_exit1:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit2:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit3:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop_begin
loop_begin:
%var_val = load i32, ptr %var
switch i32 %cond2, label %loop_exit2 [
i32 0, label %loop0
i32 1, label %loop1
i32 2, label %loop2
], !prof !{!"branch_weights", i32 99, i32 100, i32 101, i32 102}
loop0:
call void @some_func()
br label %loop_latch
loop1:
call void @some_func()
br label %loop_latch
loop2:
call void @some_func()
br label %loop_latch
loop_latch:
br label %loop_begin
loop_exit1:
ret i32 0
loop_exit2:
ret i32 0
loop_exit3:
ret i32 0
}
; Test for a trivially unswitchable switch with multiple exiting cases and
; multiple looping cases.
define i32 @test4(ptr %var, i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[COND2:%.*]], label [[LOOP_EXIT2:%.*]] [
; CHECK-NEXT: i32 13, label [[LOOP_EXIT1:%.*]]
; CHECK-NEXT: i32 42, label [[LOOP_EXIT3:%.*]]
; CHECK-NEXT: i32 0, label [[ENTRY_SPLIT:%.*]]
; CHECK-NEXT: i32 1, label [[ENTRY_SPLIT]]
; CHECK-NEXT: i32 2, label [[ENTRY_SPLIT]]
; CHECK-NEXT: ], !prof ![[MD4:[0-9]+]]
; CHECK: entry.split:
; CHECK-NEXT: br label [[LOOP_BEGIN:%.*]]
; CHECK: loop_begin:
; CHECK-NEXT: [[VAR_VAL:%.*]] = load i32, ptr [[VAR:%.*]]
; CHECK-NEXT: switch i32 [[COND2]], label [[LOOP2:%.*]] [
; CHECK-NEXT: i32 0, label [[LOOP0:%.*]]
; CHECK-NEXT: i32 1, label [[LOOP1:%.*]]
; CHECK-NEXT: ], !prof ![[MD3:[0-9]+]]
; CHECK: loop0:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH:%.*]]
; CHECK: loop1:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop2:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop_latch:
; CHECK-NEXT: br label [[LOOP_BEGIN]]
; CHECK: loop_exit1:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit2:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit3:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop_begin
loop_begin:
%var_val = load i32, ptr %var
switch i32 %cond2, label %loop_exit2 [
i32 0, label %loop0
i32 1, label %loop1
i32 13, label %loop_exit1
i32 2, label %loop2
i32 42, label %loop_exit3
], !prof !{!"branch_weights", i32 99, i32 100, i32 101, i32 113, i32 102, i32 142}
loop0:
call void @some_func()
br label %loop_latch
loop1:
call void @some_func()
br label %loop_latch
loop2:
call void @some_func()
br label %loop_latch
loop_latch:
br label %loop_begin
loop_exit1:
ret i32 0
loop_exit2:
ret i32 0
loop_exit3:
ret i32 0
}
; Test for a switch statement with the optional "expected" tag in its
; branch-weight metadata.
define i32 @test5_expected(ptr %var, i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @test5_expected(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[COND2:%.*]], label [[ENTRY_SPLIT:%.*]] [
; CHECK-NEXT: i32 2, label [[LOOP_EXIT2:%.*]]
; CHECK-NEXT: ], !prof ![[MD0]]
; CHECK: entry.split:
; CHECK-NEXT: br label [[LOOP_BEGIN:%.*]]
; CHECK: loop_begin:
; CHECK-NEXT: [[VAR_VAL:%.*]] = load i32, ptr [[VAR:%.*]]
; CHECK-NEXT: switch i32 [[COND2]], label [[LOOP2:%.*]] [
; CHECK-NEXT: i32 0, label [[LOOP0:%.*]]
; CHECK-NEXT: i32 1, label [[LOOP1:%.*]]
; CHECK-NEXT: ], !prof ![[MD1]]
; CHECK: loop0:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH:%.*]]
; CHECK: loop1:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop2:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop_latch:
; CHECK-NEXT: br label [[LOOP_BEGIN]]
; CHECK: loop_exit1:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit2:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit3:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop_begin
loop_begin:
%var_val = load i32, ptr %var
switch i32 %cond2, label %loop2 [
i32 0, label %loop0
i32 1, label %loop1
i32 2, label %loop_exit2
], !prof !{!"branch_weights", !"expected", i32 99, i32 100, i32 101, i32 102}
loop0:
call void @some_func()
br label %loop_latch
loop1:
call void @some_func()
br label %loop_latch
loop2:
call void @some_func()
br label %loop_latch
loop_latch:
br label %loop_begin
loop_exit1:
ret i32 0
loop_exit2:
ret i32 0
loop_exit3:
ret i32 0
}
; Default destination is the loop exit and the "expected" origin tag is present.
; Before the fix the default weight (300) was lost and replaced with 0.
define i32 @test6_expected_default_exit(ptr %var, i32 %cond1, i32 %cond2) {
; CHECK-LABEL: @test6_expected_default_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: switch i32 [[COND2:%.*]], label [[LOOP_EXIT2:%.*]] [
; CHECK-NEXT: i32 0, label [[ENTRY_SPLIT:%.*]]
; CHECK-NEXT: i32 1, label [[ENTRY_SPLIT]]
; CHECK-NEXT: i32 2, label [[ENTRY_SPLIT]]
; CHECK-NEXT: ], !prof ![[MD5:[0-9]+]]
; CHECK: entry.split:
; CHECK-NEXT: br label [[LOOP_BEGIN:%.*]]
; CHECK: loop_begin:
; CHECK-NEXT: [[VAR_VAL:%.*]] = load i32, ptr [[VAR:%.*]]
; CHECK-NEXT: switch i32 [[COND2]], label [[LOOP2:%.*]] [
; CHECK-NEXT: i32 0, label [[LOOP0:%.*]]
; CHECK-NEXT: i32 1, label [[LOOP1:%.*]]
; CHECK-NEXT: ], !prof ![[MD3]]
; CHECK: loop0:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH:%.*]]
; CHECK: loop1:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop2:
; CHECK-NEXT: call void @some_func()
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop_latch:
; CHECK-NEXT: br label [[LOOP_BEGIN]]
; CHECK: loop_exit1:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit2:
; CHECK-NEXT: ret i32 0
; CHECK: loop_exit3:
; CHECK-NEXT: ret i32 0
;
entry:
br label %loop_begin
loop_begin:
%var_val = load i32, ptr %var
switch i32 %cond2, label %loop_exit2 [
i32 0, label %loop0
i32 1, label %loop1
i32 2, label %loop2
], !prof !{!"branch_weights", !"expected", i32 300, i32 100, i32 101, i32 102}
loop0:
call void @some_func()
br label %loop_latch
loop1:
call void @some_func()
br label %loop_latch
loop2:
call void @some_func()
br label %loop_latch
loop_latch:
br label %loop_begin
loop_exit1:
ret i32 0
loop_exit2:
ret i32 0
loop_exit3:
ret i32 0
}
; CHECK: ![[MD0]] = !{!"branch_weights", i32 300, i32 102}
; CHECK: ![[MD1]] = !{!"branch_weights", i32 99, i32 100, i32 101}
; CHECK: ![[MD2]] = !{!"branch_weights", i32 99, i32 100, i32 101, i32 102}
; CHECK: ![[MD3]] = !{!"branch_weights", i32 102, i32 100, i32 101}
; CHECK: ![[MD4]] = !{!"branch_weights", i32 99, i32 113, i32 142, i32 100, i32 101, i32 102}
; CHECK: ![[MD5]] = !{!"branch_weights", i32 300, i32 100, i32 101, i32 102}
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