/
basic-loop.ll
137 lines (122 loc) · 4.46 KB
/
basic-loop.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -passes="loop-mssa(guard-widening)" -verify-memoryssa < %s | FileCheck %s
declare void @llvm.experimental.guard(i1,...)
@G = external global i32
; Show that we can widen into early checks within a loop, and in the process
; expose optimization oppurtunities.
define void @widen_within_loop(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
; CHECK-LABEL: @widen_within_loop(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: store i32 0, i32* @G
; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]]
; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]]
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ]
; CHECK-NEXT: store i32 1, i32* @G
; CHECK-NEXT: store i32 2, i32* @G
; CHECK-NEXT: store i32 3, i32* @G
; CHECK-NEXT: br label [[LOOP]]
;
entry:
br label %loop
loop:
store i32 0, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
store i32 1, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ]
store i32 2, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
store i32 3, i32* @G
br label %loop
}
define void @widen_into_preheader(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
; CHECK-LABEL: @widen_into_preheader(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i32 0, i32* @G
; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_1:%.*]]
; CHECK-NEXT: [[WIDE_CHK1:%.*]] = and i1 [[WIDE_CHK]], [[COND_2:%.*]]
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK1]]) [ "deopt"(i32 0) ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: store i32 1, i32* @G
; CHECK-NEXT: store i32 2, i32* @G
; CHECK-NEXT: store i32 3, i32* @G
; CHECK-NEXT: br label [[LOOP]]
;
entry:
store i32 0, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
br label %loop
loop:
store i32 1, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_1) [ "deopt"(i32 1) ]
store i32 2, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
store i32 3, i32* @G
br label %loop
}
define void @dont_widen_over_common_exit(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
; CHECK-LABEL: @dont_widen_over_common_exit(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: store i32 0, i32* @G
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_0:%.*]]) [ "deopt"(i32 0) ]
; CHECK-NEXT: store i32 1, i32* @G
; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]]
; CHECK: backedge:
; CHECK-NEXT: store i32 2, i32* @G
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND_2:%.*]]) [ "deopt"(i32 2) ]
; CHECK-NEXT: store i32 3, i32* @G
; CHECK-NEXT: br label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
store i32 0, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
store i32 1, i32* @G
br i1 %cond_1, label %backedge, label %exit
backedge:
store i32 2, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
store i32 3, i32* @G
br label %loop
exit:
ret void
}
define void @widen_over_common_exit_to_ph(i1 %cond_0, i1 %cond_1, i1 %cond_2) {
; CHECK-LABEL: @widen_over_common_exit_to_ph(
; CHECK-NEXT: entry:
; CHECK-NEXT: store i32 0, i32* @G
; CHECK-NEXT: [[WIDE_CHK:%.*]] = and i1 [[COND_0:%.*]], [[COND_2:%.*]]
; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[WIDE_CHK]]) [ "deopt"(i32 0) ]
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: store i32 1, i32* @G
; CHECK-NEXT: br i1 [[COND_1:%.*]], label [[BACKEDGE:%.*]], label [[EXIT:%.*]]
; CHECK: backedge:
; CHECK-NEXT: store i32 2, i32* @G
; CHECK-NEXT: store i32 3, i32* @G
; CHECK-NEXT: br label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
store i32 0, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_0) [ "deopt"(i32 0) ]
br label %loop
loop:
store i32 1, i32* @G
br i1 %cond_1, label %backedge, label %exit
backedge:
store i32 2, i32* @G
call void(i1, ...) @llvm.experimental.guard(i1 %cond_2) [ "deopt"(i32 2) ]
store i32 3, i32* @G
br label %loop
exit:
ret void
}