1; Test asan internal compiler flags: 2; -asan-instrument-dynamic-allocas 3 4; RUN: opt < %s -passes=asan -asan-instrument-dynamic-allocas -S | FileCheck %s --check-prefix=CHECK-ALLOCA 5target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" 6target triple = "x86_64-unknown-linux-gnu" 7 8define void @foo(i32 %len) sanitize_address { 9entry: 10; CHECK-ALLOCA-LABEL: define void @foo 11; CHECK-ALLOCA: __asan_alloca_poison 12; CHECK-ALLOCA: __asan_allocas_unpoison 13; CHECK-ALLOCA: ret void 14 %0 = alloca i32, align 4 15 %1 = alloca ptr 16 store volatile i32 %len, ptr %0, align 4 17 %2 = load i32, ptr %0, align 4 18 %3 = zext i32 %2 to i64 19 %4 = alloca i8, i64 %3, align 32 20 store volatile i8 0, ptr %4 21 ret void 22} 23 24; Test that dynamic alloca is not used for inalloca variables. 25define void @has_inalloca() uwtable sanitize_address { 26; CHECK-ALLOCA-LABEL: define void @has_inalloca 27; CHECK-ALLOCA-NOT: __asan_alloca_poison 28; CHECK-ALLOCA-NOT: __asan_alloca_unpoison 29; CHECK-ALLOCA: ret void 30entry: 31 %t = alloca inalloca i32 32 store i32 42, ptr %t 33 call void @pass_inalloca(ptr inalloca(i32) %t) 34 ret void 35} 36 37declare void @pass_inalloca(ptr inalloca(i32)) 38