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cc9246c4cd
In r242510, non-instrumented allocas are now moved into the first basic block. This patch limits that to only move allocas that are present *after* the first instrumented one (i.e. only move allocas up). A testcase was updated to show behavior in these two cases. Without the patch, an alloca could be moved down, and could cause an invalid IR. Differential Revision: http://reviews.llvm.org/D11339 llvm-svn: 242883
40 lines
1.2 KiB
LLVM
40 lines
1.2 KiB
LLVM
; This test checks that non-instrumented allocas stay in the first basic block.
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; Only first-basic-block allocas are considered stack slots, and moving them
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; breaks debug info.
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; RUN: opt < %s -asan -asan-module -S | FileCheck %s
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.10.0"
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define i32 @foo() sanitize_address {
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entry:
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; Won't be instrumented because of asan-skip-promotable-allocas.
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%non_instrumented1 = alloca i32, align 4
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; Regular alloca, will get instrumented (forced by the ptrtoint below).
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%instrumented = alloca i32, align 4
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; Won't be instrumented because of asan-skip-promotable-allocas.
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%non_instrumented2 = alloca i32, align 4
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br label %bb0
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bb0:
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; Won't be instrumented because of asan-skip-promotable-allocas.
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%non_instrumented3 = alloca i32, align 4
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%ptr = ptrtoint i32* %instrumented to i32
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br label %bb1
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bb1:
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ret i32 %ptr
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}
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; CHECK: entry:
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; CHECK: %non_instrumented1 = alloca i32, align 4
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; CHECK: %non_instrumented2 = alloca i32, align 4
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; CHECK: load i32, i32* @__asan_option_detect_stack_use_after_return
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; CHECK: bb0:
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; CHECK: %non_instrumented3 = alloca i32, align 4
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