| ; RUN: opt -gvn-hoist -S < %s | FileCheck %s |
| |
| target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" |
| target triple = "i686-pc-windows-msvc18.0.0" |
| |
| %struct.S = type { i8* } |
| |
| declare void @f(<{ %struct.S }>* inalloca) |
| |
| |
| ; Check that we don't clone the %x alloca and insert it in the live range of |
| ; %argmem, which would break the inalloca contract. |
| ; |
| ; CHECK-LABEL: @test |
| ; CHECK: alloca i8 |
| ; CHECK: stacksave |
| ; CHECK: alloca inalloca |
| ; CHECK-NOT: alloca i8 |
| |
| ; Check that store instructions are hoisted. |
| ; CHECK: store i8 |
| ; CHECK-NOT: store i8 |
| ; CHECK: stackrestore |
| |
| define void @test(i1 %b) { |
| entry: |
| %x = alloca i8 |
| %inalloca.save = call i8* @llvm.stacksave() |
| %argmem = alloca inalloca <{ %struct.S }>, align 4 |
| %0 = getelementptr inbounds <{ %struct.S }>, <{ %struct.S }>* %argmem, i32 0, i32 0 |
| br i1 %b, label %true, label %false |
| |
| true: |
| %p = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0 |
| store i8* %x, i8** %p, align 4 |
| br label %exit |
| |
| false: |
| %p2 = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0 |
| store i8* %x, i8** %p2, align 4 |
| br label %exit |
| |
| exit: |
| call void @f(<{ %struct.S }>* inalloca %argmem) |
| call void @llvm.stackrestore(i8* %inalloca.save) |
| ret void |
| } |
| |
| declare i8* @llvm.stacksave() |
| declare void @llvm.stackrestore(i8*) |