1 ; RUN: opt < %s -indvars -S | FileCheck %s
2 ; RUN: opt < %s -indvars -disable-iv-rewrite -S | FileCheck %s
6 ; Do a bunch of analysis and prove that the loops can use an i32 trip
7 ; count without casting.
9 ; Note that all four functions should actually be converted to
10 ; memset. However, this test case validates indvars behavior. We
11 ; don't check that phis are "folded together" because that is a job
12 ; for loop strength reduction. But indvars must remove sext, zext,
15 ; CHECK-NOT: {{sext|zext|trunc|add i8}}
18 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-n:8:16:32"
19 target triple = "i686-pc-linux-gnu"
21 define void @kinds__sbytezero([256 x i32]* nocapture %a) nounwind {
23 %tmp46 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1]
24 store i32 0, i32* %tmp46
27 bb: ; preds = %bb, %bb.thread
28 %i.0.reg2mem.0 = phi i8 [ -128, %bb.thread ], [ %tmp8, %bb ] ; <i8> [#uses=1]
29 %tmp8 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3]
30 %tmp1 = sext i8 %tmp8 to i32 ; <i32> [#uses=1]
31 %tmp3 = add i32 %tmp1, 128 ; <i32> [#uses=1]
32 %tmp4 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp3 ; <i32*> [#uses=1]
33 store i32 0, i32* %tmp4
34 %0 = icmp eq i8 %tmp8, 127 ; <i1> [#uses=1]
35 br i1 %0, label %return, label %bb
41 define void @kinds__ubytezero([256 x i32]* nocapture %a) nounwind {
43 %tmp35 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1]
44 store i32 0, i32* %tmp35
47 bb: ; preds = %bb, %bb.thread
48 %i.0.reg2mem.0 = phi i8 [ 0, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=1]
49 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3]
50 %tmp1 = zext i8 %tmp7 to i32 ; <i32> [#uses=1]
51 %tmp3 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp1 ; <i32*> [#uses=1]
52 store i32 0, i32* %tmp3
53 %0 = icmp eq i8 %tmp7, -1 ; <i1> [#uses=1]
54 br i1 %0, label %return, label %bb
60 define void @kinds__srangezero([21 x i32]* nocapture %a) nounwind {
64 bb: ; preds = %bb, %bb.thread
65 %i.0.reg2mem.0 = phi i8 [ -10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2]
66 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1]
67 %tmp4 = add i32 %tmp12, 10 ; <i32> [#uses=1]
68 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1]
69 store i32 0, i32* %tmp5
70 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2]
71 %0 = icmp sgt i8 %tmp7, 10 ; <i1> [#uses=1]
72 br i1 %0, label %return, label %bb
78 define void @kinds__urangezero([21 x i32]* nocapture %a) nounwind {
82 bb: ; preds = %bb, %bb.thread
83 %i.0.reg2mem.0 = phi i8 [ 10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2]
84 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1]
85 %tmp4 = add i32 %tmp12, -10 ; <i32> [#uses=1]
86 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1]
87 store i32 0, i32* %tmp5
88 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2]
89 %0 = icmp sgt i8 %tmp7, 30 ; <i1> [#uses=1]
90 br i1 %0, label %return, label %bb