[SCEV] Fix ScalarEvolution tests under NPM
Many tests use opt's -analyze feature, which does not translate well to
NPM and has better alternatives. The alternative here is to explicitly
add a pass that calls ScalarEvolution::print().
The legacy pass manager RUNs aren't changing, but they are now pinned to
the legacy pass manager. For each legacy pass manager RUN, I added a
corresponding NPM RUN using the 'print<scalar-evolution>' pass. For
compatibility with update_analyze_test_checks.py and existing test
CHECKs, 'print<scalar-evolution>' now prints what -analyze prints per
function.
This was generated by the following Python script and failures were
manually fixed up:
import sys
for i in sys.argv:
with open(i, 'r') as f:
s = f.read()
with open(i, 'w') as f:
for l in s.splitlines():
if "RUN:" in l and ' -analyze ' in l and '\\' not in l:
f.write(l.replace(' -analyze ', ' -analyze -enable-new-pm=0 '))
f.write('\n')
f.write(l.replace(' -analyze ', ' -disable-output ').replace(' -scalar-evolution ', ' "-passes=print<scalar-evolution>" ').replace(" | ", " 2>&1 | "))
f.write('\n')
else:
f.write(l)
There are a couple failures still in ScalarEvolution under NPM, but
those are due to other unrelated naming conflicts.
Reviewed By: asbirlea
Differential Revision: https://reviews.llvm.org/D83798
2020-07-17 02:09:47 +08:00
|
|
|
; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution | FileCheck %s
|
|
|
|
|
; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" 2>&1 | FileCheck %s
|
2016-09-16 22:38:13 +08:00
|
|
|
|
|
|
|
|
; ScalarEvolution should be able to compute trip count of the loop by proving
|
|
|
|
|
; that this is not an infinite loop with side effects.
|
|
|
|
|
|
|
|
|
|
; CHECK: Determining loop execution counts for: @foo1
|
|
|
|
|
; CHECK: backedge-taken count is ((-1 + %n) /u %s)
|
|
|
|
|
|
|
|
|
|
; We should have a conservative estimate for the max backedge taken count for
|
|
|
|
|
; loops with unknown stride.
|
|
|
|
|
; CHECK: max backedge-taken count is -1
|
|
|
|
|
|
|
|
|
|
target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
|
|
|
|
|
|
|
|
|
|
; Function Attrs: norecurse nounwind
|
|
|
|
|
define void @foo1(i32* nocapture %A, i32 %n, i32 %s) #0 {
|
|
|
|
|
entry:
|
|
|
|
|
%cmp4 = icmp sgt i32 %n, 0
|
|
|
|
|
br i1 %cmp4, label %for.body, label %for.end
|
|
|
|
|
|
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
|
|
|
%i.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
|
|
|
|
|
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.05
|
|
|
|
|
%0 = load i32, i32* %arrayidx, align 4
|
|
|
|
|
%inc = add nsw i32 %0, 1
|
|
|
|
|
store i32 %inc, i32* %arrayidx, align 4
|
|
|
|
|
%add = add nsw i32 %i.05, %s
|
|
|
|
|
%cmp = icmp slt i32 %add, %n
|
|
|
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
|
|
|
|
|
|
for.end: ; preds = %for.body, %entry
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
; Check that we are able to compute trip count of a loop without an entry guard.
|
|
|
|
|
; CHECK: Determining loop execution counts for: @foo2
|
|
|
|
|
; CHECK: backedge-taken count is ((-1 + (%n smax %s)) /u %s)
|
|
|
|
|
|
|
|
|
|
; We should have a conservative estimate for the max backedge taken count for
|
|
|
|
|
; loops with unknown stride.
|
|
|
|
|
; CHECK: max backedge-taken count is -1
|
|
|
|
|
|
|
|
|
|
; Function Attrs: norecurse nounwind
|
|
|
|
|
define void @foo2(i32* nocapture %A, i32 %n, i32 %s) #0 {
|
|
|
|
|
entry:
|
|
|
|
|
br label %for.body
|
|
|
|
|
|
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
|
|
|
%i.05 = phi i32 [ %add, %for.body ], [ 0, %entry ]
|
|
|
|
|
%arrayidx = getelementptr inbounds i32, i32* %A, i32 %i.05
|
|
|
|
|
%0 = load i32, i32* %arrayidx, align 4
|
|
|
|
|
%inc = add nsw i32 %0, 1
|
|
|
|
|
store i32 %inc, i32* %arrayidx, align 4
|
|
|
|
|
%add = add nsw i32 %i.05, %s
|
|
|
|
|
%cmp = icmp slt i32 %add, %n
|
|
|
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
|
|
|
|
|
|
for.end: ; preds = %for.body, %entry
|
|
|
|
|
ret void
|
|
|
|
|
}
|
|
|
|
|
|