1 ; RUN: opt -S -loop-vectorize -force-vector-width=2 -force-vector-unroll=1 -mcpu=prescott < %s | FileCheck %s 2 3 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-f80:32:32-n8:16:32-S128" 4 target triple = "i386-unknown-freebsd11.0" 5 6 @big = external global [0 x i32] 7 8 ; PR18049 9 ; We need to truncate the exit count to i32. This is legal because the 10 ; arithmetic is signed (%inc is nsw). 11 12 ; CHECK-LABEL: tripcount 13 ; CHECK: trunc i64 %count to i32 14 15 define void @tripcount(i64 %count) { 16 entry: 17 %cmp6 = icmp sgt i64 %count, 0 18 br i1 %cmp6, label %for.body.preheader, label %for.end 19 20 for.body.preheader: 21 br label %for.body 22 23 for.body: 24 %i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ] 25 %arrayidx = getelementptr inbounds [0 x i32]* @big, i32 0, i32 %i.07 26 %0 = load i32* %arrayidx, align 4 27 %neg = xor i32 %0, -1 28 store i32 %neg, i32* %arrayidx, align 4 29 %inc = add nsw i32 %i.07, 1 30 %conv = sext i32 %inc to i64 31 %cmp = icmp slt i64 %conv, %count 32 br i1 %cmp, label %for.body, label %for.end.loopexit 33 34 for.end.loopexit: 35 br label %for.end 36 37 for.end: 38 ret void 39 } 40
