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[SanitizerCoverage] Avoid unnecessary inttoptr #119097

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Merged
merged 4 commits into from
Dec 9, 2024
Merged

[SanitizerCoverage] Avoid unnecessary inttoptr #119097

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fa78bc0
[𝘀𝗽𝗿] initial version
arichardson Dec 7, 2024
8c1a3ae
rebase
arichardson Dec 8, 2024
b4bec94
fix incorrect GEP index
arichardson Dec 9, 2024
f1f8597
fix commit message
arichardson Dec 9, 2024
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6 changes: 2 additions & 4 deletions llvm/lib/Transforms/Instrumentation/SanitizerCoverage.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -1045,10 +1045,8 @@ void ModuleSanitizerCoverage::InjectCoverageAtBlock(Function &F, BasicBlock &BB,
->setCannotMerge(); // gets the PC using GET_CALLER_PC.
}
if (Options.TracePCGuard) {
auto GuardPtr = IRB.CreateIntToPtr(
IRB.CreateAdd(IRB.CreatePointerCast(FunctionGuardArray, IntptrTy),
ConstantInt::get(IntptrTy, Idx * 4)),
PtrTy);
auto GuardPtr = IRB.CreateConstInBoundsGEP2_64(
FunctionGuardArray->getValueType(), FunctionGuardArray, 0, Idx);
if (Options.GatedCallbacks) {
Instruction *I = &*IP;
auto GateBranch = CreateGateBranch(F, FunctionGateCmp, I);
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3 changes: 2 additions & 1 deletion llvm/test/Instrumentation/SanitizerCoverage/cmp-tracing-api-x86_32.ll
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Expand Up @@ -7,13 +7,14 @@ target triple = "i386-unknown-linux-gnu"
define i32 @foo() #0 {
; CHECK-LABEL: define i32 @foo() comdat {
; CHECK-NEXT: entry:
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr inttoptr (i32 ptrtoint (ptr @__sancov_gen_ to i32) to ptr)) #[[ATTR1:[0-9]+]]
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr @__sancov_gen_) #[[ATTR1:[0-9]+]]
; CHECK-NEXT: ret i32 0
;
entry:
ret i32 0
}

; UTC_ARGS: --disable
; CHECK-DAG: declare void @__sanitizer_cov_trace_pc_indir(i32)
; CHECK-DAG: declare void @__sanitizer_cov_trace_cmp1(i8 zeroext, i8 zeroext)
; CHECK-DAG: declare void @__sanitizer_cov_trace_cmp2(i16 zeroext, i16 zeroext)
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4 changes: 2 additions & 2 deletions llvm/test/Instrumentation/SanitizerCoverage/missing_dbg.ll
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Expand Up @@ -12,7 +12,7 @@ define i32 @with_dbg(ptr %a, ptr %b) !dbg !3 {
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 42
; CHECK-NEXT: br i1 [[CMP]], label %[[BB0:.*]], label %[[BB1:.*]]
; CHECK: [[BB0]]:
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr inttoptr (i64 add (i64 ptrtoint (ptr @__sancov_gen_ to i64), i64 4) to ptr)) #[[ATTR1]], !dbg [[DBG7:![0-9]+]]
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr getelementptr inbounds ([2 x i32], ptr @__sancov_gen_, i64 0, i64 1)) #[[ATTR1]], !dbg [[DBG7:![0-9]+]]
; CHECK-NEXT: store i32 [[TMP1]], ptr [[B]], align 4
; CHECK-NEXT: br label %[[BB1]]
; CHECK: [[BB1]]:
Expand All @@ -38,7 +38,7 @@ define i32 @without_dbg(ptr %a, ptr %b) {
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[TMP1]], 42
; CHECK-NEXT: br i1 [[CMP]], label %[[BB0:.*]], label %[[BB1:.*]]
; CHECK: [[BB0]]:
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr inttoptr (i64 add (i64 ptrtoint (ptr @__sancov_gen_.1 to i64), i64 4) to ptr)) #[[ATTR1]]
; CHECK-NEXT: call void @__sanitizer_cov_trace_pc_guard(ptr getelementptr inbounds ([2 x i32], ptr @__sancov_gen_.1, i64 0, i64 1)) #[[ATTR1]]
; CHECK-NEXT: store i32 [[TMP1]], ptr [[B]], align 4
; CHECK-NEXT: br label %[[BB1]]
; CHECK: [[BB1]]:
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