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; Test alloca instrumentation.
;
; RUN: opt < %s -passes=hwasan -S | FileCheck %s --check-prefixes=CHECK,NO-UAR-TAGS
; RUN: opt < %s -passes=hwasan -hwasan-uar-retag-to-zero=0 -S | FileCheck %s --check-prefixes=CHECK,UAR-TAGS
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
declare void @use32(i32*)
define void @test_alloca() sanitize_hwaddress {
; CHECK-LABEL: @test_alloca(
; CHECK: %[[FP:[^ ]*]] = call i8* @llvm.frameaddress.p0i8(i32 0)
; CHECK: %[[A:[^ ]*]] = ptrtoint i8* %[[FP]] to i64
; CHECK: %[[B:[^ ]*]] = lshr i64 %[[A]], 20
; CHECK: %[[A_XOR_B:[^ ]*]] = xor i64 %[[A]], %[[B]]
; CHECK: %[[BASE_TAG:[^ ]*]] = and i64 %[[A_XOR_B]], 63
; CHECK: %[[X:[^ ]*]] = alloca { i32, [12 x i8] }, align 16
; CHECK: %[[X_BC:[^ ]*]] = bitcast { i32, [12 x i8] }* %[[X]] to i32*
; CHECK: %[[X_TAG:[^ ]*]] = xor i64 %[[BASE_TAG]], 0
; CHECK: %[[X1:[^ ]*]] = ptrtoint i32* %[[X_BC]] to i64
; CHECK: %[[C:[^ ]*]] = shl i64 %[[X_TAG]], 57
; CHECK: %[[D:[^ ]*]] = or i64 %[[X1]], %[[C]]
; CHECK: %[[X_HWASAN:[^ ]*]] = inttoptr i64 %[[D]] to i32*
; CHECK: %[[X_TAG2:[^ ]*]] = trunc i64 %[[X_TAG]] to i8
; CHECK: %[[X_I8:[^ ]*]] = bitcast i32* %[[X_BC]] to i8*
; CHECK: call void @__hwasan_tag_memory(i8* %[[X_I8]], i8 %[[X_TAG2]], i64 16)
; CHECK: call void @use32(i32* nonnull %[[X_HWASAN]])
; UAR-TAGS: %[[BASE_TAG_COMPL:[^ ]*]] = xor i64 %[[BASE_TAG]], 63
; UAR-TAGS: %[[X_TAG_UAR:[^ ]*]] = trunc i64 %[[BASE_TAG_COMPL]] to i8
; CHECK: %[[X_I8_2:[^ ]*]] = bitcast i32* %[[X_BC]] to i8*
; NO-UAR-TAGS: call void @__hwasan_tag_memory(i8* %[[X_I8_2]], i8 0, i64 16)
; UAR-TAGS: call void @__hwasan_tag_memory(i8* %[[X_I8_2]], i8 %[[X_TAG_UAR]], i64 16)
; CHECK: ret void
entry:
%x = alloca i32, align 4
call void @use32(i32* nonnull %x)
ret void
}
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