1 ; RUN: opt -gvn-hoist -S < %s | FileCheck %s 2 3 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" 4 target triple = "i686-pc-windows-msvc18.0.0" 5 6 %struct.S = type { i8* } 7 8 declare void @f(<{ %struct.S }>* inalloca) 9 10 11 ; Check that we don't clone the %x alloca and insert it in the live range of 12 ; %argmem, which would break the inalloca contract. 13 ; 14 ; CHECK-LABEL: @test 15 ; CHECK: alloca i8 16 ; CHECK: stacksave 17 ; CHECK: alloca inalloca 18 ; CHECK-NOT: alloca i8 19 20 ; Check that store instructions are hoisted. 21 ; CHECK: store i8 22 ; CHECK-NOT: store i8 23 ; CHECK: stackrestore 24 25 define void @test(i1 %b) { 26 entry: 27 %x = alloca i8 28 %inalloca.save = call i8* @llvm.stacksave() 29 %argmem = alloca inalloca <{ %struct.S }>, align 4 30 %0 = getelementptr inbounds <{ %struct.S }>, <{ %struct.S }>* %argmem, i32 0, i32 0 31 br i1 %b, label %true, label %false 32 33 true: 34 %p = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0 35 store i8* %x, i8** %p, align 4 36 br label %exit 37 38 false: 39 %p2 = getelementptr inbounds %struct.S, %struct.S* %0, i32 0, i32 0 40 store i8* %x, i8** %p2, align 4 41 br label %exit 42 43 exit: 44 call void @f(<{ %struct.S }>* inalloca %argmem) 45 call void @llvm.stackrestore(i8* %inalloca.save) 46 ret void 47 } 48 49 declare i8* @llvm.stacksave() 50 declare void @llvm.stackrestore(i8*) 51
