lsr-wrap.ll
1.44 KB
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; RUN: llc -mtriple=x86_64-- < %s | FileCheck %s
; LSR would like to use a single IV for both of these, however it's
; not safe due to wraparound.
; CHECK: addb $-4, %
; CHECK: decw %
@g_19 = common global i32 0 ; <i32*> [#uses=2]
declare i32 @func_8(i8 zeroext) nounwind
declare i32 @func_3(i8 signext) nounwind
define void @func_1() nounwind {
entry:
br label %bb
bb: ; preds = %bb, %entry
%indvar = phi i16 [ 0, %entry ], [ %indvar.next, %bb ] ; <i16> [#uses=2]
%tmp = sub i16 0, %indvar ; <i16> [#uses=1]
%tmp27 = trunc i16 %tmp to i8 ; <i8> [#uses=1]
%tmp1 = load i32, i32* @g_19, align 4 ; <i32> [#uses=2]
%tmp2 = add i32 %tmp1, 1 ; <i32> [#uses=1]
store i32 %tmp2, i32* @g_19, align 4
%tmp3 = trunc i32 %tmp1 to i8 ; <i8> [#uses=1]
%tmp4 = tail call i32 @func_8(i8 zeroext %tmp3) nounwind ; <i32> [#uses=0]
%tmp5 = shl i8 %tmp27, 2 ; <i8> [#uses=1]
%tmp6 = add i8 %tmp5, -112 ; <i8> [#uses=1]
%tmp7 = tail call i32 @func_3(i8 signext %tmp6) nounwind ; <i32> [#uses=0]
%indvar.next = add i16 %indvar, 1 ; <i16> [#uses=2]
%exitcond = icmp eq i16 %indvar.next, -28 ; <i1> [#uses=1]
br i1 %exitcond, label %return, label %bb
return: ; preds = %bb
ret void
}