mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-21 18:29:45 +00:00
7c9c6ed761
Essentially the same as the GEP change in r230786.
A similar migration script can be used to update test cases, though a few more
test case improvements/changes were required this time around: (r229269-r229278)
import fileinput
import sys
import re
pat = re.compile(r"((?:=|:|^)\s*load (?:atomic )?(?:volatile )?(.*?))(| addrspace\(\d+\) *)\*($| *(?:%|@|null|undef|blockaddress|getelementptr|addrspacecast|bitcast|inttoptr|\[\[[a-zA-Z]|\{\{).*$)")
for line in sys.stdin:
sys.stdout.write(re.sub(pat, r"\1, \2\3*\4", line))
Reviewers: rafael, dexonsmith, grosser
Differential Revision: http://reviews.llvm.org/D7649
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@230794 91177308-0d34-0410-b5e6-96231b3b80d8
36 lines
1.4 KiB
LLVM
36 lines
1.4 KiB
LLVM
; RUN: opt < %s -analyze -scalar-evolution | FileCheck %s
|
|
|
|
; CHECK: Determining loop execution counts for: @test
|
|
; CHECK: Loop %for.body: backedge-taken count is ((-2 + %len) /u 2)
|
|
; CHECK: Loop %for.body: max backedge-taken count is 1073741823
|
|
|
|
define zeroext i16 @test(i16* nocapture %p, i32 %len) nounwind readonly {
|
|
entry:
|
|
%cmp2 = icmp sgt i32 %len, 1
|
|
br i1 %cmp2, label %for.body.preheader, label %for.end
|
|
|
|
for.body.preheader: ; preds = %entry
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %for.body.preheader
|
|
%p.addr.05 = phi i16* [ %incdec.ptr, %for.body ], [ %p, %for.body.preheader ]
|
|
%len.addr.04 = phi i32 [ %sub, %for.body ], [ %len, %for.body.preheader ]
|
|
%res.03 = phi i32 [ %add, %for.body ], [ 0, %for.body.preheader ]
|
|
%incdec.ptr = getelementptr inbounds i16, i16* %p.addr.05, i32 1
|
|
%0 = load i16, i16* %p.addr.05, align 2
|
|
%conv = zext i16 %0 to i32
|
|
%add = add i32 %conv, %res.03
|
|
%sub = add nsw i32 %len.addr.04, -2
|
|
%cmp = icmp sgt i32 %sub, 1
|
|
br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge
|
|
|
|
for.cond.for.end_crit_edge: ; preds = %for.body
|
|
%extract.t = trunc i32 %add to i16
|
|
br label %for.end
|
|
|
|
for.end: ; preds = %for.cond.for.end_crit_edge, %entry
|
|
%res.0.lcssa.off0 = phi i16 [ %extract.t, %for.cond.for.end_crit_edge ], [ 0, %entry ]
|
|
ret i16 %res.0.lcssa.off0
|
|
}
|
|
|