maxjhandsome
/
llvm-project
forked from OSchip/llvm-project
1
0
Fork 0
Code Issues Pull Requests Packages Releases Wiki Activity
llvm-project/llvm/test/CodeGen/X86/pr14562.ll

16 lines
396 B
LLVM
Raw Normal View History

PR14562 - Truncation of left shift became undef DAGCombiner::ReduceLoadWidth was converting (trunc i32 (shl i64 v, 32)) into (shl i32 v, 32) into undef. To prevent this, check the shift count against the final result size. Patch by: Kevin Schoedel Reviewed by: Nadav Rotem llvm-svn: 174972
2013-02-12 23:21:21 +08:00
; RUN: llc < %s -march=x86 | FileCheck %s
@temp1 = global i64 -77129852189294865, align 8
define void @foo() nounwind {
[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
%x = load i64, i64* @temp1, align 8
PR14562 - Truncation of left shift became undef DAGCombiner::ReduceLoadWidth was converting (trunc i32 (shl i64 v, 32)) into (shl i32 v, 32) into undef. To prevent this, check the shift count against the final result size. Patch by: Kevin Schoedel Reviewed by: Nadav Rotem llvm-svn: 174972
2013-02-12 23:21:21 +08:00
%s = shl i64 %x, 32
%t = trunc i64 %s to i32
%z = zext i32 %t to i64
store i64 %z, i64* @temp1, align 8
Fix the lit test added in r174972 Patch by: Kevin Schoedel llvm-svn: 174974
2013-02-13 00:07:27 +08:00
; CHECK: movl $0, {{_?}}temp1+4
; CHECK: movl $0, {{_?}}temp1
PR14562 - Truncation of left shift became undef DAGCombiner::ReduceLoadWidth was converting (trunc i32 (shl i64 v, 32)) into (shl i32 v, 32) into undef. To prevent this, check the shift count against the final result size. Patch by: Kevin Schoedel Reviewed by: Nadav Rotem llvm-svn: 174972
2013-02-12 23:21:21 +08:00
ret void
}