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llvm-6502/test/Instrumentation/DataFlowSanitizer/load.ll
Peter Collingbourne 934d1f83ae Introduce two command-line flags for the instrumentation pass to control whether the labels of pointers should be ignored in load and store instructions 
The new command line flags are -dfsan-ignore-pointer-label-on-store and -dfsan-ignore-pointer-label-on-load. Their default value matches the current labelling scheme.

Additionally, the function __dfsan_union_load is marked as readonly.

Patch by Lorenzo Martignoni!

Differential Revision: http://llvm-reviews.chandlerc.com/D2187

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195382 91177308-0d34-0410-b5e6-96231b3b80d8
2013-11-21 23:20:54 +00:00

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; RUN: opt < %s -dfsan -dfsan-combine-pointer-labels-on-load=1 -S | FileCheck %s --check-prefix=COMBINE_PTR_LABEL
; RUN: opt < %s -dfsan -dfsan-combine-pointer-labels-on-load=0 -S | FileCheck %s --check-prefix=NO_COMBINE_PTR_LABEL
target 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-S128"
define i8 @load8(i8* %p) {
; COMBINE_PTR_LABEL: @"dfs$load8"
; COMBINE_PTR_LABEL: load i16*
; COMBINE_PTR_LABEL: ptrtoint i8* {{.*}} to i64
; COMBINE_PTR_LABEL: and i64
; COMBINE_PTR_LABEL: mul i64
; COMBINE_PTR_LABEL: inttoptr i64
; COMBINE_PTR_LABEL: load i16*
; COMBINE_PTR_LABEL: icmp ne i16
; COMBINE_PTR_LABEL: call zeroext i16 @__dfsan_union
; COMBINE_PTR_LABEL: load i8*
; COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; COMBINE_PTR_LABEL: ret i8
; NO_COMBINE_PTR_LABEL: @"dfs$load8"
; NO_COMBINE_PTR_LABEL: ptrtoint i8*
; NO_COMBINE_PTR_LABEL: and i64
; NO_COMBINE_PTR_LABEL: mul i64
; NO_COMBINE_PTR_LABEL: inttoptr i64 {{.*}} to i16*
; NO_COMBINE_PTR_LABEL: load i16*
; NO_COMBINE_PTR_LABEL: load i8*
; NO_COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; NO_COMBINE_PTR_LABEL: ret i8
%a = load i8* %p
ret i8 %a
}
define i16 @load16(i16* %p) {
; COMBINE_PTR_LABEL: @"dfs$load16"
; COMBINE_PTR_LABEL: ptrtoint i16*
; COMBINE_PTR_LABEL: and i64
; COMBINE_PTR_LABEL: mul i64
; COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; COMBINE_PTR_LABEL: getelementptr i16
; COMBINE_PTR_LABEL: load i16*
; COMBINE_PTR_LABEL: load i16*
; COMBINE_PTR_LABEL: icmp ne
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union
; COMBINE_PTR_LABEL: icmp ne i16
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union
; COMBINE_PTR_LABEL: load i16*
; COMBINE_PTR_LABEL: store {{.*}} @__dfsan_retval_tls
; COMBINE_PTR_LABEL: ret i16
; NO_COMBINE_PTR_LABEL: @"dfs$load16"
; NO_COMBINE_PTR_LABEL: ptrtoint i16*
; NO_COMBINE_PTR_LABEL: and i64
; NO_COMBINE_PTR_LABEL: mul i64
; NO_COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; NO_COMBINE_PTR_LABEL: getelementptr i16*
; NO_COMBINE_PTR_LABEL: load i16*
; NO_COMBINE_PTR_LABEL: load i16*
; NO_COMBINE_PTR_LABEL: icmp ne i16
; NO_COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union
; NO_COMBINE_PTR_LABEL: load i16*
; NO_COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; NO_COMBINE_PTR_LABEL: ret i16
%a = load i16* %p
ret i16 %a
}
define i32 @load32(i32* %p) {
; COMBINE_PTR_LABEL: @"dfs$load32"
; COMBINE_PTR_LABEL: ptrtoint i32*
; COMBINE_PTR_LABEL: and i64
; COMBINE_PTR_LABEL: mul i64
; COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; COMBINE_PTR_LABEL: bitcast i16* {{.*}} i64*
; COMBINE_PTR_LABEL: load i64*
; COMBINE_PTR_LABEL: trunc i64 {{.*}} i16
; COMBINE_PTR_LABEL: shl i64
; COMBINE_PTR_LABEL: lshr i64
; COMBINE_PTR_LABEL: or i64
; COMBINE_PTR_LABEL: icmp eq i64
; COMBINE_PTR_LABEL: icmp ne i16
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union
; COMBINE_PTR_LABEL: load i32*
; COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; COMBINE_PTR_LABEL: ret i32
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union_load
; NO_COMBINE_PTR_LABEL: @"dfs$load32"
; NO_COMBINE_PTR_LABEL: ptrtoint i32*
; NO_COMBINE_PTR_LABEL: and i64
; NO_COMBINE_PTR_LABEL: mul i64
; NO_COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; NO_COMBINE_PTR_LABEL: bitcast i16* {{.*}} i64*
; NO_COMBINE_PTR_LABEL: load i64*
; NO_COMBINE_PTR_LABEL: trunc i64 {{.*}} i16
; NO_COMBINE_PTR_LABEL: shl i64
; NO_COMBINE_PTR_LABEL: lshr i64
; NO_COMBINE_PTR_LABEL: or i64
; NO_COMBINE_PTR_LABEL: icmp eq i64
; NO_COMBINE_PTR_LABEL: load i32*
; NO_COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; NO_COMBINE_PTR_LABEL: ret i32
; NO_COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union_load
%a = load i32* %p
ret i32 %a
}
define i64 @load64(i64* %p) {
; COMBINE_PTR_LABEL: @"dfs$load64"
; COMBINE_PTR_LABEL: ptrtoint i64*
; COMBINE_PTR_LABEL: and i64
; COMBINE_PTR_LABEL: mul i64
; COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; COMBINE_PTR_LABEL: bitcast i16* {{.*}} i64*
; COMBINE_PTR_LABEL: load i64*
; COMBINE_PTR_LABEL: trunc i64 {{.*}} i16
; COMBINE_PTR_LABEL: shl i64
; COMBINE_PTR_LABEL: lshr i64
; COMBINE_PTR_LABEL: or i64
; COMBINE_PTR_LABEL: icmp eq i64
; COMBINE_PTR_LABEL: icmp ne i16
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union
; COMBINE_PTR_LABEL: load i64*
; COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; COMBINE_PTR_LABEL: ret i64
; COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union_load
; COMBINE_PTR_LABEL: getelementptr i64* {{.*}} i64
; COMBINE_PTR_LABEL: load i64*
; COMBINE_PTR_LABEL: icmp eq i64
; NO_COMBINE_PTR_LABEL: @"dfs$load64"
; NO_COMBINE_PTR_LABEL: ptrtoint i64*
; NO_COMBINE_PTR_LABEL: and i64
; NO_COMBINE_PTR_LABEL: mul i64
; NO_COMBINE_PTR_LABEL: inttoptr i64 {{.*}} i16*
; NO_COMBINE_PTR_LABEL: bitcast i16* {{.*}} i64*
; NO_COMBINE_PTR_LABEL: load i64*
; NO_COMBINE_PTR_LABEL: trunc i64 {{.*}} i16
; NO_COMBINE_PTR_LABEL: shl i64
; NO_COMBINE_PTR_LABEL: lshr i64
; NO_COMBINE_PTR_LABEL: or i64
; NO_COMBINE_PTR_LABEL: icmp eq i64
; NO_COMBINE_PTR_LABEL: load i64*
; NO_COMBINE_PTR_LABEL: store i16 {{.*}} @__dfsan_retval_tls
; NO_COMBINE_PTR_LABEL: ret i64
; NO_COMBINE_PTR_LABEL: call {{.*}} @__dfsan_union_load
; NO_COMBINE_PTR_LABEL: getelementptr i64* {{.*}} i64
; NO_COMBINE_PTR_LABEL: load i64*
; NO_COMBINE_PTR_LABEL: icmp eq i64
%a = load i64* %p
ret i64 %a
}
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