1 ; RUN: opt < %s -indvars -S | FileCheck %s 2 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-f80:128:128" 3 target triple = "i386-apple-darwin10.0" 4 5 ; PR4775 6 ; Indvars shouldn't sink the alloca out of the entry block, even though 7 ; it's not used until after the loop. 8 define i32 @main() nounwind { 9 ; CHECK: entry: 10 ; CHECK-NEXT: %result.i = alloca i32, align 4 11 entry: 12 %result.i = alloca i32, align 4 ; <i32*> [#uses=2] 13 br label %while.cond 14 15 while.cond: ; preds = %while.cond, %entry 16 %call = call i32 @bar() nounwind ; <i32> [#uses=1] 17 %tobool = icmp eq i32 %call, 0 ; <i1> [#uses=1] 18 br i1 %tobool, label %while.end, label %while.cond 19 20 while.end: ; preds = %while.cond 21 store volatile i32 0, i32* %result.i 22 %tmp.i = load volatile i32* %result.i ; <i32> [#uses=0] 23 ret i32 0 24 } 25 declare i32 @bar() 26 27 ; <rdar://problem/10352360> 28 ; Indvars shouldn't sink the first alloca between the stacksave and stackrestore 29 ; intrinsics. 30 declare i8* @a(...) 31 declare i8* @llvm.stacksave() nounwind 32 declare void @llvm.stackrestore(i8*) nounwind 33 define void @h(i64 %n) nounwind uwtable ssp { 34 ; CHECK: entry: 35 ; CHECK-NEXT: %vla = alloca i8* 36 ; CHECK-NEXT: %savedstack = call i8* @llvm.stacksave() 37 entry: 38 %vla = alloca i8*, i64 %n, align 16 39 %savedstack = call i8* @llvm.stacksave() nounwind 40 %vla.i = alloca i8*, i64 %n, align 16 41 br label %for.body.i 42 43 for.body.i: 44 %indvars.iv37.i = phi i64 [ %indvars.iv.next38.i, %for.body.i ], [ 0, %entry ] 45 %call.i = call i8* (...)* @a() nounwind 46 %arrayidx.i = getelementptr inbounds i8** %vla.i, i64 %indvars.iv37.i 47 store i8* %call.i, i8** %arrayidx.i, align 8 48 %indvars.iv.next38.i = add i64 %indvars.iv37.i, 1 49 %exitcond5 = icmp eq i64 %indvars.iv.next38.i, %n 50 br i1 %exitcond5, label %g.exit, label %for.body.i 51 52 g.exit: 53 call void @llvm.stackrestore(i8* %savedstack) nounwind 54 %call1 = call i8* (...)* @a(i8** %vla) nounwind 55 ret void 56 } 57
