| ; RUN: opt < %s -indvars -S | FileCheck %s |
| 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" |
| target triple = "i386-apple-darwin10.0" |
| |
| ; PR4775 |
| ; Indvars shouldn't sink the alloca out of the entry block, even though |
| ; it's not used until after the loop. |
| define i32 @main() nounwind { |
| ; CHECK: entry: |
| ; CHECK-NEXT: %result.i = alloca i32, align 4 |
| entry: |
| %result.i = alloca i32, align 4 ; <i32*> [#uses=2] |
| br label %while.cond |
| |
| while.cond: ; preds = %while.cond, %entry |
| %call = call i32 @bar() nounwind ; <i32> [#uses=1] |
| %tobool = icmp eq i32 %call, 0 ; <i1> [#uses=1] |
| br i1 %tobool, label %while.end, label %while.cond |
| |
| while.end: ; preds = %while.cond |
| store volatile i32 0, i32* %result.i |
| %tmp.i = load volatile i32, i32* %result.i ; <i32> [#uses=0] |
| ret i32 0 |
| } |
| declare i32 @bar() |
| |
| ; <rdar://problem/10352360> |
| ; Indvars shouldn't sink the first alloca between the stacksave and stackrestore |
| ; intrinsics. |
| declare i8* @a(...) |
| declare i8* @llvm.stacksave() nounwind |
| declare void @llvm.stackrestore(i8*) nounwind |
| define void @h(i64 %n) nounwind uwtable ssp { |
| ; CHECK: entry: |
| ; CHECK-NEXT: %vla = alloca i8* |
| ; CHECK-NEXT: %savedstack = call i8* @llvm.stacksave() |
| entry: |
| %vla = alloca i8*, i64 %n, align 16 |
| %savedstack = call i8* @llvm.stacksave() nounwind |
| %vla.i = alloca i8*, i64 %n, align 16 |
| br label %for.body.i |
| |
| for.body.i: |
| %indvars.iv37.i = phi i64 [ %indvars.iv.next38.i, %for.body.i ], [ 0, %entry ] |
| %call.i = call i8* (...) @a() nounwind |
| %arrayidx.i = getelementptr inbounds i8*, i8** %vla.i, i64 %indvars.iv37.i |
| store i8* %call.i, i8** %arrayidx.i, align 8 |
| %indvars.iv.next38.i = add i64 %indvars.iv37.i, 1 |
| %exitcond5 = icmp eq i64 %indvars.iv.next38.i, %n |
| br i1 %exitcond5, label %g.exit, label %for.body.i |
| |
| g.exit: |
| call void @llvm.stackrestore(i8* %savedstack) nounwind |
| %call1 = call i8* (...) @a(i8** %vla) nounwind |
| ret void |
| } |