1 ; RUN: opt -S -gvn-hoist < %s | FileCheck %s 2 3 ; Check that the stores are not hoisted: it is invalid to hoist stores if they 4 ; are not executed on all paths. In this testcase, there are paths in the loop 5 ; that do not execute the stores. 6 7 ; CHECK-LABEL: define i32 @main 8 ; CHECK: store 9 ; CHECK: store 10 ; CHECK: store 11 12 @a = global i32 0, align 4 13 14 define i32 @main() { 15 entry: 16 br label %for.cond 17 18 for.cond: ; preds = %for.inc5, %entry 19 %0 = load i32, i32* @a, align 4 20 %cmp = icmp slt i32 %0, 1 21 br i1 %cmp, label %for.cond1, label %for.end7 22 23 for.cond1: ; preds = %for.cond, %for.inc 24 %1 = load i32, i32* @a, align 4 25 %cmp2 = icmp slt i32 %1, 1 26 br i1 %cmp2, label %for.body3, label %for.inc5 27 28 for.body3: ; preds = %for.cond1 29 %tobool = icmp ne i32 %1, 0 30 br i1 %tobool, label %if.then, label %for.inc 31 32 if.then: ; preds = %for.body3 33 %inc = add nsw i32 %1, 1 34 store i32 %inc, i32* @a, align 4 35 br label %for.inc 36 37 for.inc: ; preds = %for.body3, %if.then 38 %2 = load i32, i32* @a, align 4 39 %inc4 = add nsw i32 %2, 1 40 store i32 %inc4, i32* @a, align 4 41 br label %for.cond1 42 43 for.inc5: ; preds = %for.cond1 44 %inc6 = add nsw i32 %1, 1 45 store i32 %inc6, i32* @a, align 4 46 br label %for.cond 47 48 for.end7: ; preds = %for.cond 49 ret i32 %0 50 } 51 52
