mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-17 03:30:28 +00:00
104f4adeac
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@130294 91177308-0d34-0410-b5e6-96231b3b80d8
33 lines
966 B
LLVM
33 lines
966 B
LLVM
; RUN: opt < %s -analyze -iv-users
|
|
; PR9633: Tests that SCEV handles the mul.i2 recurrence being folded to
|
|
; constant zero.
|
|
|
|
define signext i8 @func_14(i8 signext %p_18) nounwind readnone ssp {
|
|
entry:
|
|
br label %for.inc
|
|
|
|
for.inc:
|
|
%p_17.addr.012 = phi i32 [ 0, %entry ], [ %add, %for.inc ]
|
|
%add = add nsw i32 %p_17.addr.012, 1
|
|
br i1 false, label %for.inc, label %for.cond
|
|
|
|
for.cond:
|
|
%tobool.i = icmp ult i32 %add, 8192
|
|
%shl.i = select i1 %tobool.i, i32 13, i32 0
|
|
%shl.left.i = shl i32 %add, %shl.i
|
|
%conv.i4 = trunc i32 %shl.left.i to i8
|
|
br i1 undef, label %for.inc9, label %if.then
|
|
|
|
for.inc9:
|
|
%p_18.addr.011 = phi i8 [ %add12, %for.inc9 ], [ %p_18, %for.cond ]
|
|
%add12 = add i8 %p_18.addr.011, 1
|
|
%mul.i2 = mul i8 %add12, %conv.i4
|
|
%mul.i2.lobit = lshr i8 %mul.i2, 7
|
|
%lor.ext.shr.i = select i1 undef, i8 %mul.i2.lobit, i8 %mul.i2
|
|
%tobool = icmp eq i8 %lor.ext.shr.i, 0
|
|
br i1 %tobool, label %for.inc9, label %if.then
|
|
|
|
if.then:
|
|
ret i8 0
|
|
|
|
} |