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/change-compare-stride-trick...

Ignoring revisions in .git-blame-ignore-revs. Click here to bypass and see the normal blame view.

59 lines
2.2 KiB
LLVM
Raw Normal View History

Eliminate more uses of llvm-as and llvm-dis. llvm-svn: 81293
2009-09-09 08:09:15 +08:00
; RUN: llc < %s
In ChangeCompareStride, when the stride to be reused is truncated to a smaller type, promoted its offset back up to the type of the new comparison. This fixes PR4222. llvm-svn: 72493
2009-05-28 04:00:18 +08:00
; PR4222
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "x86_64-pc-linux-gnu"
module asm ".ident\09\22$FreeBSD: head/sys/amd64/amd64/minidump_machdep.c 184499 2008-10-31 10:11:35Z kib $\22"
%struct.dumperinfo = type <{ i32 (i8*, i8*, i64, i64, i64)*, i8*, i32, i32, i64, i64 }>
define void @minidumpsys(%struct.dumperinfo* %di) nounwind {
entry:
br label %if.end
if.end: ; preds = %if.end52, %entry
br label %for.cond.i.preheader
for.cond.i.preheader: ; preds = %if.end52, %if.end
%indvar688 = phi i64 [ 0, %if.end ], [ %indvar.next689, %if.end52 ] ; <i64> [#uses=3]
%tmp690 = shl i64 %indvar688, 12 ; <i64> [#uses=1]
%pa.0642 = add i64 %tmp690, 0 ; <i64> [#uses=1]
%indvar688703 = trunc i64 %indvar688 to i32 ; <i32> [#uses=1]
%tmp692693 = add i32 %indvar688703, 1 ; <i32> [#uses=1]
%phitmp = sext i32 %tmp692693 to i64 ; <i64> [#uses=1]
br i1 false, label %if.end52, label %land.lhs.true.i
land.lhs.true.i: ; preds = %for.cond.i.preheader
%shr2.i = lshr i64 %pa.0642, 18 ; <i64> [#uses=0]
unreachable
if.end52: ; preds = %for.cond.i.preheader
%phitmp654 = icmp ult i64 %phitmp, 512 ; <i1> [#uses=1]
%indvar.next689 = add i64 %indvar688, 1 ; <i64> [#uses=1]
br i1 %phitmp654, label %for.cond.i.preheader, label %if.end
}
Revert 72493 and replace it with a more conservative fix, for now: don't rewrite the comparison if there is any implicit extension or truncation on the induction variable. I'm planning for IVUsers to eventually take over some of the work of this code, and for it to be generalized. llvm-svn: 72496
2009-05-28 05:10:47 +08:00
define void @promote(%struct.dumperinfo* %di) nounwind {
entry:
br label %if.end
if.end: ; preds = %if.end52, %entry
br label %for.cond.i.preheader
for.cond.i.preheader: ; preds = %if.end52, %if.end
%indvar688 = phi i32 [ 0, %if.end ], [ %indvar.next689, %if.end52 ] ; <i64> [#uses=3]
%tmp690 = shl i32 %indvar688, 12 ; <i64> [#uses=1]
%pa.0642 = add i32 %tmp690, 0 ; <i64> [#uses=1]
%tmp692693 = add i32 %indvar688, 1 ; <i32> [#uses=1]
%phitmp = sext i32 %tmp692693 to i64 ; <i64> [#uses=1]
br i1 false, label %if.end52, label %land.lhs.true.i
land.lhs.true.i: ; preds = %for.cond.i.preheader
%shr2.i = lshr i32 %pa.0642, 18 ; <i64> [#uses=0]
unreachable
if.end52: ; preds = %for.cond.i.preheader
%phitmp654 = icmp ult i64 %phitmp, 512 ; <i1> [#uses=1]
%indvar.next689 = add i32 %indvar688, 1 ; <i64> [#uses=1]
br i1 %phitmp654, label %for.cond.i.preheader, label %if.end
}