mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-22 10:42:39 +01:00
[LoopUnroll] Add additional test with one unpredictable exit (NFC)
One exit is unpredictable, the other has a known trip count. For one function the predictable exit is the latch exit, for the other the non-latch exit. Currently they are treated differently.
This commit is contained in:
Nikita Popov
parent
dd23a07d05
commit
6b76b629b6
@ -1,68 +0,0 @@
|
||||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt -S -loop-unroll %s | FileCheck %s
|
||||
|
||||
; Full unrolling can be performed against the header exit here, but we have
|
||||
; both multiple exits and a latch exit. After full unrolling, this function
|
||||
; folds to ret i1 true.
|
||||
|
||||
define i1 @test() {
|
||||
; CHECK-LABEL: @test(
|
||||
; CHECK-NEXT: start:
|
||||
; CHECK-NEXT: [[A1:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A2:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A1_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A1_0]], align 8
|
||||
; CHECK-NEXT: [[A1_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A1_1]], align 8
|
||||
; CHECK-NEXT: [[A2_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A2_0]], align 8
|
||||
; CHECK-NEXT: [[A2_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A2_1]], align 8
|
||||
; CHECK-NEXT: br label [[LOOP:%.*]]
|
||||
; CHECK: loop:
|
||||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[START:%.*]] ], [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ]
|
||||
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV]], 2
|
||||
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LATCH]]
|
||||
; CHECK: latch:
|
||||
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
|
||||
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 [[IV]]
|
||||
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 [[IV]]
|
||||
; CHECK-NEXT: [[LOAD1:%.*]] = load i64, i64* [[GEP1]], align 8
|
||||
; CHECK-NEXT: [[LOAD2:%.*]] = load i64, i64* [[GEP2]], align 8
|
||||
; CHECK-NEXT: [[EXITCOND2:%.*]] = icmp eq i64 [[LOAD1]], [[LOAD2]]
|
||||
; CHECK-NEXT: br i1 [[EXITCOND2]], label [[LOOP]], label [[EXIT]]
|
||||
; CHECK: exit:
|
||||
; CHECK-NEXT: [[EXIT_VAL:%.*]] = phi i1 [ false, [[LATCH]] ], [ true, [[LOOP]] ]
|
||||
; CHECK-NEXT: ret i1 [[EXIT_VAL]]
|
||||
;
|
||||
start:
|
||||
%a1 = alloca [2 x i64], align 8
|
||||
%a2 = alloca [2 x i64], align 8
|
||||
%a1.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a1.0, align 8
|
||||
%a1.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a1.1, align 8
|
||||
%a2.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a2.0, align 8
|
||||
%a2.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a2.1, align 8
|
||||
br label %loop
|
||||
|
||||
loop:
|
||||
%iv = phi i64 [ 0, %start ], [ %iv.next, %latch ]
|
||||
%exitcond = icmp eq i64 %iv, 2
|
||||
br i1 %exitcond, label %exit, label %latch
|
||||
|
||||
latch:
|
||||
%iv.next = add nuw nsw i64 %iv, 1
|
||||
%gep1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 %iv
|
||||
%gep2 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 %iv
|
||||
%load1 = load i64, i64* %gep1, align 8
|
||||
%load2 = load i64, i64* %gep2, align 8
|
||||
%exitcond2 = icmp eq i64 %load1, %load2
|
||||
br i1 %exitcond2, label %loop, label %exit
|
||||
|
||||
exit:
|
||||
%exit.val = phi i1 [ false, %latch ], [ true, %loop ]
|
||||
ret i1 %exit.val
|
||||
}
|
||||
135
test/Transforms/LoopUnroll/full-unroll-one-unpredictable-exit.ll
Normal file
135
test/Transforms/LoopUnroll/full-unroll-one-unpredictable-exit.ll
Normal file
@ -0,0 +1,135 @@
|
||||
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
||||
; RUN: opt -S -loop-unroll %s | FileCheck %s
|
||||
|
||||
; In both cases, we have one unpredictable exit and one IV-based exit with
|
||||
; known trip count. We can fully unroll against the latter. In one of the
|
||||
; examples the IV-based exit is the latch exit, in the other the non-latch
|
||||
; exit. After full unrolling, the functions fold to ret i1 true.
|
||||
|
||||
define i1 @test_latch() {
|
||||
; CHECK-LABEL: @test_latch(
|
||||
; CHECK-NEXT: start:
|
||||
; CHECK-NEXT: [[A1:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A2:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A1_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A1_0]], align 8
|
||||
; CHECK-NEXT: [[A1_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A1_1]], align 8
|
||||
; CHECK-NEXT: [[A2_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A2_0]], align 8
|
||||
; CHECK-NEXT: [[A2_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A2_1]], align 8
|
||||
; CHECK-NEXT: br label [[LOOP:%.*]]
|
||||
; CHECK: loop:
|
||||
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 0
|
||||
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 0
|
||||
; CHECK-NEXT: [[LOAD1:%.*]] = load i64, i64* [[GEP1]], align 8
|
||||
; CHECK-NEXT: [[LOAD2:%.*]] = load i64, i64* [[GEP2]], align 8
|
||||
; CHECK-NEXT: [[EXITCOND2:%.*]] = icmp eq i64 [[LOAD1]], [[LOAD2]]
|
||||
; CHECK-NEXT: br i1 [[EXITCOND2]], label [[LATCH:%.*]], label [[EXIT:%.*]]
|
||||
; CHECK: latch:
|
||||
; CHECK-NEXT: [[GEP1_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 1
|
||||
; CHECK-NEXT: [[GEP2_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 1
|
||||
; CHECK-NEXT: [[LOAD1_1:%.*]] = load i64, i64* [[GEP1_1]], align 8
|
||||
; CHECK-NEXT: [[LOAD2_1:%.*]] = load i64, i64* [[GEP2_1]], align 8
|
||||
; CHECK-NEXT: [[EXITCOND2_1:%.*]] = icmp eq i64 [[LOAD1_1]], [[LOAD2_1]]
|
||||
; CHECK-NEXT: br i1 [[EXITCOND2_1]], label [[LATCH_1:%.*]], label [[EXIT]]
|
||||
; CHECK: exit:
|
||||
; CHECK-NEXT: [[EXIT_VAL:%.*]] = phi i1 [ false, [[LOOP]] ], [ false, [[LATCH]] ], [ true, [[LATCH_1]] ]
|
||||
; CHECK-NEXT: ret i1 [[EXIT_VAL]]
|
||||
; CHECK: latch.1:
|
||||
; CHECK-NEXT: br label [[EXIT]]
|
||||
;
|
||||
start:
|
||||
%a1 = alloca [2 x i64], align 8
|
||||
%a2 = alloca [2 x i64], align 8
|
||||
%a1.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a1.0, align 8
|
||||
%a1.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a1.1, align 8
|
||||
%a2.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a2.0, align 8
|
||||
%a2.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a2.1, align 8
|
||||
br label %loop
|
||||
|
||||
loop:
|
||||
%iv = phi i64 [ 0, %start ], [ %iv.next, %latch ]
|
||||
%gep1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 %iv
|
||||
%gep2 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 %iv
|
||||
%load1 = load i64, i64* %gep1, align 8
|
||||
%load2 = load i64, i64* %gep2, align 8
|
||||
%exitcond2 = icmp eq i64 %load1, %load2
|
||||
br i1 %exitcond2, label %latch, label %exit
|
||||
|
||||
latch:
|
||||
%iv.next = add nuw nsw i64 %iv, 1
|
||||
%exitcond = icmp eq i64 %iv.next, 2
|
||||
br i1 %exitcond, label %exit, label %loop
|
||||
|
||||
exit:
|
||||
%exit.val = phi i1 [ true, %latch ], [ false, %loop ]
|
||||
ret i1 %exit.val
|
||||
}
|
||||
|
||||
define i1 @test_non_latch() {
|
||||
; CHECK-LABEL: @test_non_latch(
|
||||
; CHECK-NEXT: start:
|
||||
; CHECK-NEXT: [[A1:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A2:%.*]] = alloca [2 x i64], align 8
|
||||
; CHECK-NEXT: [[A1_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A1_0]], align 8
|
||||
; CHECK-NEXT: [[A1_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A1_1]], align 8
|
||||
; CHECK-NEXT: [[A2_0:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 0
|
||||
; CHECK-NEXT: store i64 -5015437470765251660, i64* [[A2_0]], align 8
|
||||
; CHECK-NEXT: [[A2_1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 1
|
||||
; CHECK-NEXT: store i64 -8661621401413125213, i64* [[A2_1]], align 8
|
||||
; CHECK-NEXT: br label [[LOOP:%.*]]
|
||||
; CHECK: loop:
|
||||
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[START:%.*]] ], [ [[IV_NEXT:%.*]], [[LATCH:%.*]] ]
|
||||
; CHECK-NEXT: [[EXITCOND:%.*]] = icmp eq i64 [[IV]], 2
|
||||
; CHECK-NEXT: br i1 [[EXITCOND]], label [[EXIT:%.*]], label [[LATCH]]
|
||||
; CHECK: latch:
|
||||
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
|
||||
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A1]], i64 0, i64 [[IV]]
|
||||
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [2 x i64], [2 x i64]* [[A2]], i64 0, i64 [[IV]]
|
||||
; CHECK-NEXT: [[LOAD1:%.*]] = load i64, i64* [[GEP1]], align 8
|
||||
; CHECK-NEXT: [[LOAD2:%.*]] = load i64, i64* [[GEP2]], align 8
|
||||
; CHECK-NEXT: [[EXITCOND2:%.*]] = icmp eq i64 [[LOAD1]], [[LOAD2]]
|
||||
; CHECK-NEXT: br i1 [[EXITCOND2]], label [[LOOP]], label [[EXIT]]
|
||||
; CHECK: exit:
|
||||
; CHECK-NEXT: [[EXIT_VAL:%.*]] = phi i1 [ false, [[LATCH]] ], [ true, [[LOOP]] ]
|
||||
; CHECK-NEXT: ret i1 [[EXIT_VAL]]
|
||||
;
|
||||
start:
|
||||
%a1 = alloca [2 x i64], align 8
|
||||
%a2 = alloca [2 x i64], align 8
|
||||
%a1.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a1.0, align 8
|
||||
%a1.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a1.1, align 8
|
||||
%a2.0 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 0
|
||||
store i64 -5015437470765251660, i64* %a2.0, align 8
|
||||
%a2.1 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 1
|
||||
store i64 -8661621401413125213, i64* %a2.1, align 8
|
||||
br label %loop
|
||||
|
||||
loop:
|
||||
%iv = phi i64 [ 0, %start ], [ %iv.next, %latch ]
|
||||
%exitcond = icmp eq i64 %iv, 2
|
||||
br i1 %exitcond, label %exit, label %latch
|
||||
|
||||
latch:
|
||||
%iv.next = add nuw nsw i64 %iv, 1
|
||||
%gep1 = getelementptr inbounds [2 x i64], [2 x i64]* %a1, i64 0, i64 %iv
|
||||
%gep2 = getelementptr inbounds [2 x i64], [2 x i64]* %a2, i64 0, i64 %iv
|
||||
%load1 = load i64, i64* %gep1, align 8
|
||||
%load2 = load i64, i64* %gep2, align 8
|
||||
%exitcond2 = icmp eq i64 %load1, %load2
|
||||
br i1 %exitcond2, label %loop, label %exit
|
||||
|
||||
exit:
|
||||
%exit.val = phi i1 [ false, %latch ], [ true, %loop ]
|
||||
ret i1 %exit.val
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user