1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 ; 3 ; PR1301 4 5 ; Do a bunch of analysis and prove that the loops can use an i32 trip 6 ; count without casting. 7 ; 8 ; Note that all four functions should actually be converted to 9 ; memset. However, this test case validates indvars behavior. We 10 ; don't check that phis are "folded together" because that is a job 11 ; for loop strength reduction. But indvars must remove sext, zext, and add i8. 12 ; 13 ; CHECK-NOT: {{sext|zext|add i8}} 14 15 ; ModuleID = 'ada.bc' 16 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" 17 target triple = "i686-pc-linux-gnu" 18 19 define void @kinds__sbytezero([256 x i32]* nocapture %a) nounwind { 20 bb.thread: 21 %tmp46 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1] 22 store i32 0, i32* %tmp46 23 br label %bb 24 25 bb: ; preds = %bb, %bb.thread 26 %i.0.reg2mem.0 = phi i8 [ -128, %bb.thread ], [ %tmp8, %bb ] ; <i8> [#uses=1] 27 %tmp8 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3] 28 %tmp1 = sext i8 %tmp8 to i32 ; <i32> [#uses=1] 29 %tmp3 = add i32 %tmp1, 128 ; <i32> [#uses=1] 30 %tmp4 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp3 ; <i32*> [#uses=1] 31 store i32 0, i32* %tmp4 32 %0 = icmp eq i8 %tmp8, 127 ; <i1> [#uses=1] 33 br i1 %0, label %return, label %bb 34 35 return: ; preds = %bb 36 ret void 37 } 38 39 define void @kinds__ubytezero([256 x i32]* nocapture %a) nounwind { 40 bb.thread: 41 %tmp35 = getelementptr [256 x i32]* %a, i32 0, i32 0 ; <i32*> [#uses=1] 42 store i32 0, i32* %tmp35 43 br label %bb 44 45 bb: ; preds = %bb, %bb.thread 46 %i.0.reg2mem.0 = phi i8 [ 0, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=1] 47 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=3] 48 %tmp1 = zext i8 %tmp7 to i32 ; <i32> [#uses=1] 49 %tmp3 = getelementptr [256 x i32]* %a, i32 0, i32 %tmp1 ; <i32*> [#uses=1] 50 store i32 0, i32* %tmp3 51 %0 = icmp eq i8 %tmp7, -1 ; <i1> [#uses=1] 52 br i1 %0, label %return, label %bb 53 54 return: ; preds = %bb 55 ret void 56 } 57 58 define void @kinds__srangezero([21 x i32]* nocapture %a) nounwind { 59 bb.thread: 60 br label %bb 61 62 bb: ; preds = %bb, %bb.thread 63 %i.0.reg2mem.0 = phi i8 [ -10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2] 64 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1] 65 %tmp4 = add i32 %tmp12, 10 ; <i32> [#uses=1] 66 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1] 67 store i32 0, i32* %tmp5 68 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2] 69 %0 = icmp sgt i8 %tmp7, 10 ; <i1> [#uses=1] 70 br i1 %0, label %return, label %bb 71 72 return: ; preds = %bb 73 ret void 74 } 75 76 define void @kinds__urangezero([21 x i32]* nocapture %a) nounwind { 77 bb.thread: 78 br label %bb 79 80 bb: ; preds = %bb, %bb.thread 81 %i.0.reg2mem.0 = phi i8 [ 10, %bb.thread ], [ %tmp7, %bb ] ; <i8> [#uses=2] 82 %tmp12 = sext i8 %i.0.reg2mem.0 to i32 ; <i32> [#uses=1] 83 %tmp4 = add i32 %tmp12, -10 ; <i32> [#uses=1] 84 %tmp5 = getelementptr [21 x i32]* %a, i32 0, i32 %tmp4 ; <i32*> [#uses=1] 85 store i32 0, i32* %tmp5 86 %tmp7 = add i8 %i.0.reg2mem.0, 1 ; <i8> [#uses=2] 87 %0 = icmp sgt i8 %tmp7, 30 ; <i1> [#uses=1] 88 br i1 %0, label %return, label %bb 89 90 return: ; preds = %bb 91 ret void 92 } 93
