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llvm-project/llvm/test/Transforms/LoopStrengthReduce/X86/pr17473.ll

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PR17473: Don't normalize an expression during postinc transformation unless it's invertible. llvm-svn: 203719
2014-03-13 05:31:05 +08:00
; RUN: opt < %s -loop-reduce -S | FileCheck %s
target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-apple-macosx10.9.0"
; LSR shouldn't normalize IV if it can't be denormalized to the original
; expression. In this testcase, the normalized expression was denormalized to
; an expression different from the original, and we were losing sign extension.
; CHECK: [[TMP:%[a-z]+]] = trunc i32 {{.*}} to i8
; CHECK: {{%[a-z0-9]+}} = sext i8 [[TMP]] to i32
@j = common global i32 0, align 4
@c = common global i32 0, align 4
@g = common global i32 0, align 4
@h = common global i8 0, align 1
@d = common global i32 0, align 4
@i = common global i32 0, align 4
@e = common global i32 0, align 4
@.str = private unnamed_addr constant [4 x i8] c"%x\0A\00", align 1
@a = common global i32 0, align 4
@b = common global i16 0, align 2
; Function Attrs: nounwind optsize ssp uwtable
define i32 @main() #0 {
entry:
store i8 0, i8* @h, align 1
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction 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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%0 = load i32, i32* @j, align 4
PR17473: Don't normalize an expression during postinc transformation unless it's invertible. llvm-svn: 203719
2014-03-13 05:31:05 +08:00
%tobool.i = icmp eq i32 %0, 0
[opaque pointer type] Add textual IR support for explicit type parameter to load instruction 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 llvm-svn: 230794
2015-02-28 05:17:42 +08:00
%1 = load i32, i32* @d, align 4
PR17473: Don't normalize an expression during postinc transformation unless it's invertible. llvm-svn: 203719
2014-03-13 05:31:05 +08:00
%cmp3 = icmp sgt i32 %1, -1
%.lobit = lshr i32 %1, 31
%.lobit.not = xor i32 %.lobit, 1
br label %for.body
for.body: ; preds = %entry, %fn3.exit
%inc9 = phi i8 [ 0, %entry ], [ %inc, %fn3.exit ]
%conv = sext i8 %inc9 to i32
br i1 %tobool.i, label %fn3.exit, label %land.rhs.i
land.rhs.i: ; preds = %for.body
store i32 0, i32* @c, align 4
br label %fn3.exit
fn3.exit: ; preds = %for.body, %land.rhs.i
%inc = add i8 %inc9, 1
%cmp = icmp sgt i8 %inc, -1
br i1 %cmp, label %for.body, label %for.end
for.end: ; preds = %fn3.exit
%.lobit.not. = select i1 %cmp3, i32 %.lobit.not, i32 0
store i32 %conv, i32* @g, align 4
store i32 %.lobit.not., i32* @i, align 4
store i8 %inc, i8* @h, align 1
%conv7 = sext i8 %inc to i32
%add = add nsw i32 %conv7, %conv
store i32 %add, i32* @e, align 4
%call = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8]* @.str, i64 0, i64 0), i32 %add) #2
ret i32 0
}
; Function Attrs: nounwind optsize
declare i32 @printf(i8* nocapture readonly, ...) #1
attributes #0 = { nounwind optsize ssp uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nounwind optsize "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind optsize }