222 lines
5.9 KiB
LLVM
222 lines
5.9 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -S -passes="loop-mssa(loop-instsimplify,simple-loop-unswitch<nontrivial>)" < %s | FileCheck %s
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@vtable = constant ptr @foo
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declare void @foo() memory(none)
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declare void @bar()
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; The call becomes known readnone after simplification, but still have a
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; MemoryAccess. Make sure this does not lead to an assertion failure.
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define void @test(i1 %c) {
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; CHECK-LABEL: define void @test(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[DOTSPLIT_US:%.*]], label [[DOTSPLIT:%.*]]
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; CHECK: .split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[EXIT_SPLIT_US:%.*]]
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; CHECK: exit.split.us:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: .split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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call void %fn()
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br i1 %c, label %exit, label %loop
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exit:
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ret void
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}
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; Variant with another access after the call.
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define void @test2(i1 %c, ptr %p) {
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; CHECK-LABEL: define void @test2(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[DOTSPLIT_US:%.*]], label [[DOTSPLIT:%.*]]
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; CHECK: .split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[EXIT_SPLIT_US:%.*]]
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; CHECK: exit.split.us:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: .split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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call void %fn()
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call void @bar()
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br i1 %c, label %exit, label %loop
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exit:
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ret void
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}
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; Variant with another access after the call and no access before the call.
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define void @test3(i1 %c, ptr %p) {
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; CHECK-LABEL: define void @test3(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[DOTSPLIT_US:%.*]], label [[DOTSPLIT:%.*]]
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; CHECK: .split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: br label [[SPLIT_US:%.*]]
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; CHECK: split.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[EXIT_SPLIT_US:%.*]]
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; CHECK: exit.split.us:
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: .split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: br label [[SPLIT:%.*]]
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; CHECK: split:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[LOOP]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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br label %split
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split:
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call void %fn()
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call void @bar()
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br i1 %c, label %exit, label %loop
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exit:
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ret void
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}
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; Variants of the above test with swapped branch destinations.
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define void @test1_swapped(i1 %c) {
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; CHECK-LABEL: define void @test1_swapped(
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; CHECK-SAME: i1 [[C:%.*]]) {
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; CHECK-NEXT: start:
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[START_SPLIT_US:%.*]], label [[START_SPLIT:%.*]]
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; CHECK: start.split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[LOOP_US]]
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; CHECK: start.split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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start:
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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call void %fn()
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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define void @test2_swapped(i1 %c, ptr %p) {
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; CHECK-LABEL: define void @test2_swapped(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[DOTSPLIT_US:%.*]], label [[DOTSPLIT:%.*]]
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; CHECK: .split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[LOOP_US]]
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; CHECK: .split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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call void %fn()
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call void @bar()
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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define void @test3_swapped(i1 %c, ptr %p) {
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; CHECK-LABEL: define void @test3_swapped(
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; CHECK-SAME: i1 [[C:%.*]], ptr [[P:%.*]]) {
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; CHECK-NEXT: [[C_FR:%.*]] = freeze i1 [[C]]
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; CHECK-NEXT: br i1 [[C_FR]], label [[DOTSPLIT_US:%.*]], label [[DOTSPLIT:%.*]]
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; CHECK: .split.us:
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; CHECK-NEXT: br label [[LOOP_US:%.*]]
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; CHECK: loop.us:
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; CHECK-NEXT: br label [[SPLIT_US:%.*]]
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; CHECK: split.us:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[LOOP_US]]
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; CHECK: .split:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: br label [[SPLIT:%.*]]
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; CHECK: split:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: call void @bar()
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; CHECK-NEXT: br label [[EXIT:%.*]]
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; CHECK: exit:
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; CHECK-NEXT: ret void
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;
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br label %loop
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loop:
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%fn = load ptr, ptr @vtable, align 8
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br label %split
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split:
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call void %fn()
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call void @bar()
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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