179efe5abc
Applying the loop guards to the distance may prevent isSafeDependenceDistance from determining NoDep, unless loop guards are also applied to the backedge-taken-count. Instead of applying the guards to both Dist and the backedge-taken-count, just apply them after handling isSafeDependenceDistance and constant distances; there is no benefit to applying the guards before then. This fixes a regression flagged by @bjope due to ecae3ed958481cba7d60868cf3504292f7f4fdf5.
86 lines
2.9 KiB
LLVM
86 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
|
|
; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s
|
|
|
|
target datalayout = "S16-p:16:16-i1:16-i8:8-i32:16-i64:16-i128:16"
|
|
|
|
define void @safe_deps_1_due_to_dependence_distance(i16 %n, ptr %p) {
|
|
; CHECK-LABEL: 'safe_deps_1_due_to_dependence_distance'
|
|
; CHECK-NEXT: loop:
|
|
; CHECK-NEXT: Memory dependences are safe
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Run-time memory checks:
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
|
|
; CHECK-NEXT: SCEV assumptions:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Expressions re-written:
|
|
;
|
|
entry:
|
|
%cmp42 = icmp sgt i16 %n, 0
|
|
br i1 %cmp42, label %ph, label %exit
|
|
|
|
ph:
|
|
%gep.off = getelementptr i32, ptr %p, i16 %n
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i16 [ 0, %ph ], [ %iv.next, %loop ]
|
|
%gep.iv = getelementptr inbounds i32, ptr %p, i16 %iv
|
|
store i32 0, ptr %gep.iv, align 1
|
|
%gep.off.iv = getelementptr i32, ptr %gep.off, i16 %iv
|
|
store i32 1, ptr %gep.off.iv, align 1
|
|
%iv.next = add i16 %iv, 1
|
|
%exitcond.not = icmp eq i16 %iv.next, %n
|
|
br i1 %exitcond.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|
|
define void @safe_deps_2_due_to_dependence_distance(i16 %n, ptr %p3, i16 noundef %q, ptr %p1, ptr %p2) {
|
|
; CHECK-LABEL: 'safe_deps_2_due_to_dependence_distance'
|
|
; CHECK-NEXT: loop:
|
|
; CHECK-NEXT: Memory dependences are safe
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Run-time memory checks:
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
|
|
; CHECK-NEXT: SCEV assumptions:
|
|
; CHECK-EMPTY:
|
|
; CHECK-NEXT: Expressions re-written:
|
|
;
|
|
entry:
|
|
%0 = shl i16 %n, 1
|
|
%alloca = alloca [2 x i32], i16 %0
|
|
%arrayidx1 = getelementptr inbounds i32, ptr %p1, i16 %q
|
|
%arrayidx2 = getelementptr inbounds i8, ptr %p3, i16 2
|
|
%arrayidx4 = getelementptr inbounds i32, ptr %p2, i16 %q
|
|
%cmp42 = icmp sgt i16 %n, 0
|
|
br i1 %cmp42, label %ph, label %exit
|
|
|
|
ph:
|
|
%arrayidx40 = getelementptr inbounds [2 x i32], ptr %alloca, i16 %n
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i16 [ 0, %ph ], [ %iv.next, %loop ]
|
|
%arrayidx6 = getelementptr inbounds i32, ptr %arrayidx1, i16 %iv
|
|
%arrayidx11 = getelementptr inbounds i32, ptr %arrayidx4, i16 %iv
|
|
%arrayidx22 = getelementptr inbounds [2 x i32], ptr %alloca, i16 %iv
|
|
store i32 10, ptr %arrayidx22
|
|
%arrayidx33 = getelementptr inbounds i8, ptr %arrayidx22, i16 4
|
|
store i32 16, ptr %arrayidx33
|
|
%arrayidx42 = getelementptr inbounds [2 x i32], ptr %arrayidx40, i16 %iv
|
|
store i32 19, ptr %arrayidx42
|
|
%arrayidx53 = getelementptr inbounds i8, ptr %arrayidx42, i16 4
|
|
store i32 23, ptr %arrayidx53
|
|
%iv.next = add nuw nsw i16 %iv, 1
|
|
%exitcond.not = icmp eq i16 %iv.next, %n
|
|
br i1 %exitcond.not, label %exit, label %loop
|
|
|
|
exit:
|
|
ret void
|
|
}
|