diff --git a/llvm/test/CodeGen/X86/codegen-no-uselist-constantdata.ll b/llvm/test/CodeGen/X86/codegen-no-uselist-constantdata.ll new file mode 100644 index 0000000000000..fef2c18b30a82 --- /dev/null +++ b/llvm/test/CodeGen/X86/codegen-no-uselist-constantdata.ll @@ -0,0 +1,52 @@ +; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5 +; RUN: llc -mtriple=x86_64-unknown-linux-gnu < %s | FileCheck %s + +; Make sure codegen doesn't try to inspect the use list of constants + +; Make sure we do not try to make use of the uselist of a constant +; null when looking for the alignment of the pointer. +define <2 x i32> @no_uselist_null_isDereferenceableAndAlignedPointer(i1 %arg0, ptr align(4) %arg) { +; CHECK-LABEL: no_uselist_null_isDereferenceableAndAlignedPointer: +; CHECK: # %bb.0: +; CHECK-NEXT: xorl %eax, %eax +; CHECK-NEXT: testb $1, %dil +; CHECK-NEXT: cmoveq %rsi, %rax +; CHECK-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero +; CHECK-NEXT: retq + %select.ptr = select i1 %arg0, ptr null, ptr %arg + %load = load i32, ptr %select.ptr + %insert = insertelement <2 x i32> zeroinitializer, i32 %load, i64 0 + ret <2 x i32> %insert +} + +; Make sure we do not try to inspect the uselist of a constant null +; when processing a memcpy +define void @gep_nullptr_no_inspect_uselist(ptr %arg) { +; CHECK-LABEL: gep_nullptr_no_inspect_uselist: +; CHECK: # %bb.0: +; CHECK-NEXT: movzbl 16, %eax +; CHECK-NEXT: movb %al, (%rdi) +; CHECK-NEXT: retq + %null_gep = getelementptr i8, ptr null, i64 16 + call void @llvm.memcpy.p0.p0.i64(ptr %arg, ptr %null_gep, i64 1, i1 false) + ret void +} + +define <16 x i8> @load_null_offset() { +; CHECK-LABEL: load_null_offset: +; CHECK: # %bb.0: +; CHECK-NEXT: movzbl 11, %eax +; CHECK-NEXT: movd %eax, %xmm1 +; CHECK-NEXT: pslld $8, %xmm1 +; CHECK-NEXT: xorps %xmm0, %xmm0 +; CHECK-NEXT: movss {{.*#+}} xmm0 = xmm1[0],xmm0[1,2,3] +; CHECK-NEXT: retq + %gep.null = getelementptr i8, ptr null, i64 11 + %load = load i8, ptr %gep.null, align 1 + %insert = insertelement <16 x i8> zeroinitializer, i8 %load, i64 1 + ret <16 x i8> %insert +} + +declare void @llvm.memcpy.p0.p0.i64(ptr noalias writeonly captures(none), ptr noalias readonly captures(none), i64, i1 immarg) #0 + +attributes #0 = { nocallback nofree nounwind willreturn memory(argmem: readwrite) } diff --git a/llvm/test/Transforms/CorrelatedValuePropagation/no-uselist-constantdata-regression.ll b/llvm/test/Transforms/CorrelatedValuePropagation/no-uselist-constantdata-regression.ll new file mode 100644 index 0000000000000..51be78788c454 --- /dev/null +++ b/llvm/test/Transforms/CorrelatedValuePropagation/no-uselist-constantdata-regression.ll @@ -0,0 +1,30 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5 +; RUN: opt -S -passes=correlated-propagation < %s | FileCheck %s + +; Test for regression after 87f312aad6e from trying to use the uselist of constantdata + +define ptr @_ZN4mlir6Region15getParentOfTypeINS_19FunctionOpInterfaceEEET_v() { +; CHECK-LABEL: define ptr @_ZN4mlir6Region15getParentOfTypeINS_19FunctionOpInterfaceEEET_v() { +; CHECK-NEXT: [[ENTRY:.*:]] +; CHECK-NEXT: [[CALL_FCA_0_EXTRACT:%.*]] = extractvalue [2 x i64] zeroinitializer, 0 +; CHECK-NEXT: [[I2P:%.*]] = inttoptr i64 [[CALL_FCA_0_EXTRACT]] to ptr +; CHECK-NEXT: [[CMP_I:%.*]] = icmp ne ptr [[I2P]], null +; CHECK-NEXT: br i1 [[CMP_I]], label %[[CLEANUP:.*]], label %[[DO_COND:.*]] +; CHECK: [[DO_COND]]: +; CHECK-NEXT: br label %[[CLEANUP]] +; CHECK: [[CLEANUP]]: +; CHECK-NEXT: ret ptr [[I2P]] +; +entry: + %call.fca.0.extract = extractvalue [2 x i64] zeroinitializer, 0 + %i2p = inttoptr i64 %call.fca.0.extract to ptr + %cmp.i = icmp ne ptr %i2p, null + br i1 %cmp.i, label %cleanup, label %do.cond + +do.cond: ; preds = %entry + br label %cleanup + +cleanup: ; preds = %do.cond, %entry + %phi = phi ptr [ %i2p, %entry ], [ null, %do.cond ] + ret ptr %phi +}