99da317331
LoopPredication introduces the use of possibly posion value in branch (guard) instruction, so to avoid introducing undefined behavior it should be frozen. Reviewed By: mkazantsev Differential Revision: https://reviews.llvm.org/D146685
110 lines
4.9 KiB
LLVM
110 lines
4.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -S -passes='loop-mssa(loop-predication),gvn,simplifycfg' -loop-predication-insert-assumes-of-predicated-guards-conditions=true < %s 2>&1 | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128-ni:1-p2:32:8:8:32-ni:2"
|
|
target triple = "x86_64-unknown-linux-gnu"
|
|
|
|
define i32 @test0(ptr %p1, ptr %p2, ptr %p3, ptr %p4, ptr %p5, i1 %c, i32 %x) {
|
|
; CHECK-LABEL: @test0(
|
|
; CHECK-NEXT: entry:
|
|
; CHECK-NEXT: [[P1_1:%.*]] = getelementptr i32, ptr [[P1:%.*]], i64 1
|
|
; CHECK-NEXT: [[P1_2:%.*]] = getelementptr i32, ptr [[P1]], i64 2
|
|
; CHECK-NEXT: [[P1_3:%.*]] = getelementptr i32, ptr [[P1]], i64 3
|
|
; CHECK-NEXT: [[IV_1_START:%.*]] = load i32, ptr [[P1_1]], align 4, !range [[RNG0:![0-9]+]]
|
|
; CHECK-NEXT: [[IV_1_END:%.*]] = load i32, ptr [[P1_2]], align 4, !range [[RNG0]]
|
|
; CHECK-NEXT: [[IV_2_END:%.*]] = load i32, ptr [[P1_3]], align 4, !range [[RNG0]]
|
|
; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp ult i32 [[IV_2_END]], [[IV_1_END]]
|
|
; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP_PREHEADER:%.*]], label [[EXIT:%.*]]
|
|
; CHECK: loop.preheader:
|
|
; CHECK-NEXT: [[TMP0:%.*]] = add i32 [[IV_1_END]], -1
|
|
; CHECK-NEXT: [[TMP1:%.*]] = sub i32 [[TMP0]], [[IV_1_START]]
|
|
; CHECK-NEXT: [[TMP2:%.*]] = icmp ule i32 [[IV_2_END]], [[TMP1]]
|
|
; CHECK-NEXT: [[TMP3:%.*]] = icmp ult i32 [[IV_1_START]], [[IV_1_END]]
|
|
; CHECK-NEXT: [[TMP4:%.*]] = and i1 [[TMP3]], [[TMP2]]
|
|
; CHECK-NEXT: [[TMP5:%.*]] = freeze i1 [[TMP4]]
|
|
; CHECK-NEXT: br label [[LOOP:%.*]]
|
|
; CHECK: loop:
|
|
; CHECK-NEXT: [[IV_1:%.*]] = phi i32 [ [[IV_1_NEXT:%.*]], [[LOOP_NEXT:%.*]] ], [ [[IV_1_START]], [[LOOP_PREHEADER]] ]
|
|
; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[IV_2_NEXT:%.*]], [[LOOP_NEXT]] ], [ 0, [[LOOP_PREHEADER]] ]
|
|
; CHECK-NEXT: [[GEP_1:%.*]] = getelementptr i8, ptr [[P2:%.*]], i32 [[IV_1]]
|
|
; CHECK-NEXT: [[VALUE:%.*]] = load i8, ptr [[GEP_1]], align 1
|
|
; CHECK-NEXT: [[COND_1:%.*]] = icmp ult i32 [[IV_1]], [[IV_1_END]]
|
|
; CHECK-NEXT: [[WC:%.*]] = call i1 @llvm.experimental.widenable.condition()
|
|
; CHECK-NEXT: [[TMP6:%.*]] = and i1 [[TMP5]], [[WC]]
|
|
; CHECK-NEXT: br i1 [[TMP6]], label [[LOOP_NEXT]], label [[DEOPT:%.*]]
|
|
; CHECK: loop.next:
|
|
; CHECK-NEXT: call void @llvm.assume(i1 [[COND_1]])
|
|
; CHECK-NEXT: [[GEP_3:%.*]] = getelementptr i8, ptr [[P4:%.*]], i32 [[IV_1]]
|
|
; CHECK-NEXT: store i8 [[VALUE]], ptr [[GEP_3]], align 1
|
|
; CHECK-NEXT: [[IV_1_NEXT]] = add nuw nsw i32 [[IV_1]], 1
|
|
; CHECK-NEXT: [[IV_2_NEXT]] = add nuw nsw i32 [[IV_2]], 1
|
|
; CHECK-NEXT: [[LATCH_COND:%.*]] = icmp ult i32 [[IV_2]], [[IV_2_END]]
|
|
; CHECK-NEXT: br i1 [[LATCH_COND]], label [[LOOP]], label [[EXIT]]
|
|
; CHECK: deopt:
|
|
; CHECK-NEXT: [[DEOPT_RES:%.*]] = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ]
|
|
; CHECK-NEXT: ret i32 [[DEOPT_RES]]
|
|
; CHECK: exit:
|
|
; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_2]], [[LOOP_NEXT]] ]
|
|
; CHECK-NEXT: ret i32 [[RES]]
|
|
;
|
|
entry:
|
|
%p1.1 = getelementptr i32, ptr %p1, i64 1
|
|
%p1.2 = getelementptr i32, ptr %p1, i64 2
|
|
%p1.3 = getelementptr i32, ptr %p1, i64 3
|
|
%iv.1.start = load i32, ptr %p1.1, !range !0
|
|
%iv.1.end = load i32, ptr %p1.2, !range !0
|
|
%iv.2.end = load i32, ptr %p1.3, !range !0
|
|
%loop.cond = icmp ult i32 %iv.2.end, %iv.1.end
|
|
br i1 %loop.cond, label %loop, label %exit
|
|
|
|
loop:
|
|
%iv.1 = phi i32 [ %iv.1.start, %entry ], [ %iv.1.next, %latch ]
|
|
%iv.2 = phi i32 [ 0, %entry ], [ %iv.2.next, %latch ]
|
|
%gep.1 = getelementptr i8, ptr %p2, i32 %iv.1
|
|
%value = load i8, ptr %gep.1
|
|
%cond.1 = icmp ult i32 %iv.1, %iv.1.end
|
|
%wc = call i1 @llvm.experimental.widenable.condition()
|
|
%explicit_guard_cond = and i1 %cond.1, %wc
|
|
br i1 %explicit_guard_cond, label %loop.next, label %deopt
|
|
|
|
loop.next:
|
|
br i1 %cond.1, label %if.true, label %if.false
|
|
|
|
if.true:
|
|
%gep.3 = getelementptr i8, ptr %p4, i32 %iv.1
|
|
store i8 %value, ptr %gep.3
|
|
br label %latch
|
|
|
|
if.false:
|
|
%gep.4 = getelementptr i8, ptr %p4, i32 %iv.2
|
|
store i8 %value, ptr %gep.4
|
|
br label %latch
|
|
|
|
latch:
|
|
%iv.1.next = add nuw nsw i32 %iv.1, 1
|
|
%iv.2.next = add nuw nsw i32 %iv.2, 1
|
|
%latch.cond = icmp ult i32 %iv.2, %iv.2.end
|
|
br i1 %latch.cond, label %loop, label %exit
|
|
|
|
deopt:
|
|
%deopt_res = call i32 (...) @llvm.experimental.deoptimize.i32() [ "deopt"() ]
|
|
ret i32 %deopt_res
|
|
|
|
exit:
|
|
%res = phi i32 [ 0, %entry ], [ %iv.2, %latch ]
|
|
ret i32 %res
|
|
}
|
|
|
|
; Function Attrs: inaccessiblememonly nocallback nofree nosync nounwind willreturn
|
|
declare void @llvm.assume(i1) #0
|
|
|
|
; Function Attrs: inaccessiblememonly nocallback nofree nosync nounwind speculatable willreturn
|
|
declare i1 @llvm.experimental.widenable.condition() #1
|
|
|
|
declare i32 @llvm.experimental.deoptimize.i32(...)
|
|
|
|
attributes #0 = { inaccessiblememonly nocallback nofree nosync nounwind willreturn }
|
|
attributes #1 = { inaccessiblememonly nocallback nofree nosync nounwind speculatable willreturn }
|
|
|
|
!0 = !{i32 0, i32 2147483646}
|