1 ; RUN: opt < %s -indvars -S | FileCheck %s
2 ; RUN: opt < %s -indvars -enable-iv-rewrite=false -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, and add i8.
14 ; CHECK-NOT: {{sext|zext|add i8}}
17 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-n8:16:32"
18 target triple = "i686-pc-linux-gnu"
20 define void @kinds__sbytezero([256 x i32]* nocapture %a) nounwind {
22 %tmp46 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1]
23 store i32 0, i32* %tmp46
26 bb: ; preds = %bb, %bb.thread
27 %i.0.reg2mem.0 = phi i8 [ -128, %bb.thread ], [ %tmp8, %bb ] ; <i8> [#uses=1]
28 %tmp8 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3]
29 %tmp1 = sext i8 %tmp8 to i32 ; <i32> [#uses=1]
30 %tmp3 = add i32 %tmp1, 128 ; <i32> [#uses=1]
31 %tmp4 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp3 ; <i32*> [#uses=1]
32 store i32 0, i32* %tmp4
33 %0 = icmp eq i8 %tmp8, 127 ; <i1> [#uses=1]
34 br i1 %0, label %return, label %bb
40 define void @kinds__ubytezero([256 x i32]* nocapture %a) nounwind {
42 %tmp35 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1]
43 store i32 0, i32* %tmp35
46 bb: ; preds = %bb, %bb.thread
47 %i.0.reg2mem.0 = phi i8 [ 0, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=1]
48 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3]
49 %tmp1 = zext i8 %tmp7 to i32 ; <i32> [#uses=1]
50 %tmp3 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp1 ; <i32*> [#uses=1]
51 store i32 0, i32* %tmp3
52 %0 = icmp eq i8 %tmp7, -1 ; <i1> [#uses=1]
53 br i1 %0, label %return, label %bb
59 define void @kinds__srangezero([21 x i32]* nocapture %a) nounwind {
63 bb: ; preds = %bb, %bb.thread
64 %i.0.reg2mem.0 = phi i8 [ -10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2]
65 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1]
66 %tmp4 = add i32 %tmp12, 10 ; <i32> [#uses=1]
67 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1]
68 store i32 0, i32* %tmp5
69 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2]
70 %0 = icmp sgt i8 %tmp7, 10 ; <i1> [#uses=1]
71 br i1 %0, label %return, label %bb
77 define void @kinds__urangezero([21 x i32]* nocapture %a) nounwind {
81 bb: ; preds = %bb, %bb.thread
82 %i.0.reg2mem.0 = phi i8 [ 10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2]
83 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1]
84 %tmp4 = add i32 %tmp12, -10 ; <i32> [#uses=1]
85 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1]
86 store i32 0, i32* %tmp5
87 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2]
88 %0 = icmp sgt i8 %tmp7, 30 ; <i1> [#uses=1]
89 br i1 %0, label %return, label %bb