152 lines
5.7 KiB
LLVM
152 lines
5.7 KiB
LLVM
; RUN: opt < %s -passes=asan -S | FileCheck %s
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; Source (-O0 -fsanitize=address -fsanitize-address-use-after-scope):
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;; struct S { int x, y; };
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;; void swap(S *a, S *b, bool doit) {
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;; if (!doit)
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;; return;
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;; auto tmp = *a;
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;; *a = *b;
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;; *b = tmp;
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;; }
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target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.14.0"
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%struct.S = type { i32, i32 }
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; CHECK-LABEL: define {{.*}} @_Z4swapP1SS0_b(
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; First come the argument allocas.
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; CHECK: [[argA:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argB:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argDoit:%.*]] = alloca i8,
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; Next, the stores into the argument allocas.
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argA]]
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argB]]
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; CHECK-NEXT: [[frombool:%.*]] = zext i1 {{.*}} to i8
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; CHECK-NEXT: store i8 [[frombool]], ptr [[argDoit]]
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define void @_Z4swapP1SS0_b(ptr %a, ptr %b, i1 zeroext %doit) sanitize_address {
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entry:
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%a.addr = alloca ptr, align 8
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%b.addr = alloca ptr, align 8
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%doit.addr = alloca i8, align 1
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%tmp = alloca %struct.S, align 4
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store ptr %a, ptr %a.addr, align 8
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store ptr %b, ptr %b.addr, align 8
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%frombool = zext i1 %doit to i8
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store i8 %frombool, ptr %doit.addr, align 1
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%0 = load i8, ptr %doit.addr, align 1
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%tobool = trunc i8 %0 to i1
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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br label %return
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if.end: ; preds = %entry
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%1 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %tmp, ptr align 4 %1, i64 8, i1 false)
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%2 = load ptr, ptr %b.addr, align 8
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%3 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %3, ptr align 4 %2, i64 8, i1 false)
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%4 = load ptr, ptr %b.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %4, ptr align 4 %tmp, i64 8, i1 false)
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br label %return
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return: ; preds = %if.end, %if.then
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ret void
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}
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; Synthetic test case, meant to check that we do not reorder instructions past
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; a load when attempting to hoist argument init insts.
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; CHECK-LABEL: define {{.*}} @func_with_load_in_arginit_sequence
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; CHECK: [[argA:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argB:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argDoit:%.*]] = alloca i8,
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argA]]
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argB]]
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; CHECK-NEXT: [[stack_base:%.*]] = alloca i64
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define void @func_with_load_in_arginit_sequence(ptr %a, ptr %b, i1 zeroext %doit) sanitize_address {
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entry:
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%a.addr = alloca ptr, align 8
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%b.addr = alloca ptr, align 8
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%doit.addr = alloca i8, align 1
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%tmp = alloca %struct.S, align 4
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store ptr %a, ptr %a.addr, align 8
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store ptr %b, ptr %b.addr, align 8
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; This load prevents the next argument init sequence from being moved.
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%0 = load i8, ptr %doit.addr, align 1
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%frombool = zext i1 %doit to i8
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store i8 %frombool, ptr %doit.addr, align 1
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%tobool = trunc i8 %0 to i1
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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br label %return
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if.end: ; preds = %entry
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%1 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %tmp, ptr align 4 %1, i64 8, i1 false)
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%2 = load ptr, ptr %b.addr, align 8
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%3 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %3, ptr align 4 %2, i64 8, i1 false)
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%4 = load ptr, ptr %b.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %4, ptr align 4 %tmp, i64 8, i1 false)
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br label %return
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return: ; preds = %if.end, %if.then
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ret void
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}
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; Synthetic test case, meant to check that we can handle functions with more
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; than one interesting alloca.
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; CHECK-LABEL: define {{.*}} @func_with_multiple_interesting_allocas
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; CHECK: [[argA:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argB:%.*]] = alloca ptr,
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; CHECK-NEXT: [[argDoit:%.*]] = alloca i8,
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argA]]
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; CHECK-NEXT: store ptr {{.*}}, ptr [[argB]]
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; CHECK-NEXT: [[frombool:%.*]] = zext i1 {{.*}} to i8
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; CHECK-NEXT: store i8 [[frombool]], ptr [[argDoit]]
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define void @func_with_multiple_interesting_allocas(ptr %a, ptr %b, i1 zeroext %doit) sanitize_address {
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entry:
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%a.addr = alloca ptr, align 8
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%b.addr = alloca ptr, align 8
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%doit.addr = alloca i8, align 1
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%tmp = alloca %struct.S, align 4
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%tmp2 = alloca %struct.S, align 4
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store ptr %a, ptr %a.addr, align 8
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store ptr %b, ptr %b.addr, align 8
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%frombool = zext i1 %doit to i8
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store i8 %frombool, ptr %doit.addr, align 1
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%0 = load i8, ptr %doit.addr, align 1
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%tobool = trunc i8 %0 to i1
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br i1 %tobool, label %if.end, label %if.then
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if.then: ; preds = %entry
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br label %return
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if.end: ; preds = %entry
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%1 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %tmp, ptr align 4 %1, i64 8, i1 false)
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%2 = load ptr, ptr %b.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %tmp2, ptr align 4 %2, i64 8, i1 false)
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%3 = load ptr, ptr %b.addr, align 8
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%4 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %4, ptr align 4 %3, i64 8, i1 false)
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%5 = load ptr, ptr %b.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %5, ptr align 4 %tmp, i64 8, i1 false)
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%6 = load ptr, ptr %a.addr, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr align 4 %6, ptr align 4 %tmp2, i64 8, i1 false)
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br label %return
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return: ; preds = %if.end, %if.then
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ret void
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr noalias nocapture writeonly, ptr noalias nocapture readonly, i64, i1 immarg)
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