forked from OSchip/llvm-project
139 lines
4.5 KiB
LLVM
139 lines
4.5 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -loop-guard-widening < %s | FileCheck %s
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; RUN: opt -S -passes="loop(guard-widening)" < %s | FileCheck %s
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declare void @llvm.experimental.guard(i1,...)
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@G = external global i32
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; Show that we can widen into early checks within a loop, and in the process
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; expose optimization oppurtunities.
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define void @widen_within_loop(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
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; CHECK-LABEL: @widen_within_loop(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: store i32 0, i32* @G
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; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]]
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; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: store i32 1, i32* @G
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; CHECK-NEXT: store i32 2, i32* @G
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; CHECK-NEXT: store i32 3, i32* @G
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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br label %loop
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loop:
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store i32 0, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
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store i32 1, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ]
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store i32 2, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
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store i32 3, i32* @G
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br label %loop
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}
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define void @widen_into_preheader(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
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; CHECK-LABEL: @widen_into_preheader(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, i32* @G
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; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]]
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; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: store i32 1, i32* @G
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; CHECK-NEXT: store i32 2, i32* @G
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; CHECK-NEXT: store i32 3, i32* @G
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; CHECK-NEXT: br label [[LOOP]]
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;
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entry:
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store i32 0, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
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br label %loop
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loop:
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store i32 1, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ]
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store i32 2, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
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store i32 3, i32* @G
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br label %loop
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}
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define void @dont_widen_over_common_exit(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
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; CHECK-LABEL: @dont_widen_over_common_exit(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: store i32 0, i32* @G
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_0:%.*]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: store i32 1, i32* @G
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; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]]
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; CHECK: backedge:
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; CHECK-NEXT: store i32 2, i32* @G
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_2:%.*]]) [ "deopt"(i32 2) ]
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; CHECK-NEXT: store i32 3, i32* @G
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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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entry:
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br label %loop
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loop:
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store i32 0, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
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store i32 1, i32* @G
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br i1 %cond_1, label %backedge, label %exit
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backedge:
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store i32 2, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
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store i32 3, i32* @G
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br label %loop
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exit:
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ret void
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}
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define void @widen_over_common_exit_to_ph(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
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; CHECK-LABEL: @widen_over_common_exit_to_ph(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: store i32 0, i32* @G
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; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_2:%.*]]
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; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK]]) [ "deopt"(i32 0) ]
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; CHECK-NEXT: br label [[LOOP:%.*]]
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; CHECK: loop:
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; CHECK-NEXT: store i32 1, i32* @G
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; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]]
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; CHECK: backedge:
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; CHECK-NEXT: store i32 2, i32* @G
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; CHECK-NEXT: store i32 3, i32* @G
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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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entry:
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store i32 0, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
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br label %loop
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loop:
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store i32 1, i32* @G
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br i1 %cond_1, label %backedge, label %exit
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backedge:
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store i32 2, i32* @G
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call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
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store i32 3, i32* @G
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br label %loop
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exit:
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ret void
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}
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