This revision was automatically updated to reflect the committed changes.
Closed by commit rG544a6aa2674e: [InstCombine] combineLoadToOperationType():
don't fold int<->ptr cast into load (authored by lebedev.ri).
Changed prior to commit:
https://reviews.llvm.org/D88979?vs=297217&id=297475#toc
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D88979/new/
https://reviews.llvm.org/D88979
Files:
clang/test/CodeGen/arm64_32-vaarg.c
llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
llvm/test/Transforms/InstCombine/PR30597.ll
llvm/test/Transforms/InstCombine/intptr1.ll
llvm/test/Transforms/InstCombine/load-bitcast32.ll
llvm/test/Transforms/InstCombine/load-bitcast64.ll
llvm/test/Transforms/InstCombine/memset_chk-1.ll
Index: llvm/test/Transforms/InstCombine/memset_chk-1.ll
===================================================================
--- llvm/test/Transforms/InstCombine/memset_chk-1.ll
+++ llvm/test/Transforms/InstCombine/memset_chk-1.ll
@@ -79,10 +79,10 @@
; CHECK-NEXT: [[CALL50:%.*]] = call i8* @__memmove_chk(i8* [[B]], i8* [[A]], i64 [[ADD180]], i64 [[YO107]])
; CHECK-NEXT: [[STRLEN:%.*]] = call i64 @strlen(i8* nonnull dereferenceable(1) [[B]])
; CHECK-NEXT: [[STRCHR1:%.*]] = getelementptr i8, i8* [[B]], i64 [[STRLEN]]
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8** [[C:%.*]] to i64*
-; CHECK-NEXT: [[D2:%.*]] = load i64, i64* [[TMP0]], align 8
+; CHECK-NEXT: [[D:%.*]] = load i8*, i8** [[C:%.*]], align 8
+; CHECK-NEXT: [[SUB182:%.*]] = ptrtoint i8* [[D]] to i64
; CHECK-NEXT: [[SUB183:%.*]] = ptrtoint i8* [[B]] to i64
-; CHECK-NEXT: [[SUB184:%.*]] = sub i64 [[D2]], [[SUB183]]
+; CHECK-NEXT: [[SUB184:%.*]] = sub i64 [[SUB182]], [[SUB183]]
; CHECK-NEXT: [[ADD52_I_I:%.*]] = add nsw i64 [[SUB184]], 1
; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 1 [[STRCHR1]], i8 0, i64 [[ADD52_I_I]], i1 false)
; CHECK-NEXT: ret i32 4
Index: llvm/test/Transforms/InstCombine/load-bitcast64.ll
===================================================================
--- llvm/test/Transforms/InstCombine/load-bitcast64.ll
+++ llvm/test/Transforms/InstCombine/load-bitcast64.ll
@@ -7,9 +7,10 @@
define i64* @test1(i8* %x) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64**
-; CHECK-NEXT: [[B1:%.*]] = load i64*, i64** [[TMP0]], align 4
-; CHECK-NEXT: ret i64* [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i64*
+; CHECK-NEXT: [[B:%.*]] = load i64, i64* [[A]], align 4
+; CHECK-NEXT: [[C:%.*]] = inttoptr i64 [[B]] to i64*
+; CHECK-NEXT: ret i64* [[C]]
;
entry:
%a = bitcast i8* %x to i64*
@@ -56,9 +57,10 @@
define i64 @test4(i8* %x) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; CHECK-NEXT: [[B1:%.*]] = load i64, i64* [[TMP0]], align 8
-; CHECK-NEXT: ret i64 [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i64**
+; CHECK-NEXT: [[B:%.*]] = load i64*, i64** [[A]], align 8
+; CHECK-NEXT: [[C:%.*]] = ptrtoint i64* [[B]] to i64
+; CHECK-NEXT: ret i64 [[C]]
;
entry:
%a = bitcast i8* %x to i64**
@@ -71,9 +73,10 @@
define i32 @test5(i8* %x) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; CHECK-NEXT: [[B1:%.*]] = load i64, i64* [[TMP0]], align 8
-; CHECK-NEXT: [[C:%.*]] = trunc i64 [[B1]] to i32
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32**
+; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[A]], align 8
+; CHECK-NEXT: [[TMP0:%.*]] = ptrtoint i32* [[B]] to i64
+; CHECK-NEXT: [[C:%.*]] = trunc i64 [[TMP0]] to i32
; CHECK-NEXT: ret i32 [[C]]
;
entry:
@@ -87,9 +90,10 @@
define i64 @test6(i8* %x) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64*
-; CHECK-NEXT: [[B1:%.*]] = load i64, i64* [[TMP0]], align 8
-; CHECK-NEXT: ret i64 [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32**
+; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[A]], align 8
+; CHECK-NEXT: [[C:%.*]] = ptrtoint i32* [[B]] to i64
+; CHECK-NEXT: ret i64 [[C]]
;
entry:
%a = bitcast i8* %x to i32**
Index: llvm/test/Transforms/InstCombine/load-bitcast32.ll
===================================================================
--- llvm/test/Transforms/InstCombine/load-bitcast32.ll
+++ llvm/test/Transforms/InstCombine/load-bitcast32.ll
@@ -24,9 +24,10 @@
define i32* @test2(i8* %x) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32**
-; CHECK-NEXT: [[B1:%.*]] = load i32*, i32** [[TMP0]], align 4
-; CHECK-NEXT: ret i32* [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32*
+; CHECK-NEXT: [[B:%.*]] = load i32, i32* [[A]], align 4
+; CHECK-NEXT: [[C:%.*]] = inttoptr i32 [[B]] to i32*
+; CHECK-NEXT: ret i32* [[C]]
;
entry:
%a = bitcast i8* %x to i32*
@@ -39,9 +40,10 @@
define i64* @test3(i8* %x) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i64**
-; CHECK-NEXT: [[B1:%.*]] = load i64*, i64** [[TMP0]], align 4
-; CHECK-NEXT: ret i64* [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32*
+; CHECK-NEXT: [[B:%.*]] = load i32, i32* [[A]], align 4
+; CHECK-NEXT: [[C:%.*]] = inttoptr i32 [[B]] to i64*
+; CHECK-NEXT: ret i64* [[C]]
;
entry:
%a = bitcast i8* %x to i32*
@@ -54,9 +56,10 @@
define i64 @test4(i8* %x) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; CHECK-NEXT: [[B1:%.*]] = load i32, i32* [[TMP0]], align 4
-; CHECK-NEXT: [[C:%.*]] = zext i32 [[B1]] to i64
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i64**
+; CHECK-NEXT: [[B:%.*]] = load i64*, i64** [[A]], align 4
+; CHECK-NEXT: [[TMP0:%.*]] = ptrtoint i64* [[B]] to i32
+; CHECK-NEXT: [[C:%.*]] = zext i32 [[TMP0]] to i64
; CHECK-NEXT: ret i64 [[C]]
;
entry:
@@ -70,9 +73,10 @@
define i32 @test5(i8* %x) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; CHECK-NEXT: [[B1:%.*]] = load i32, i32* [[TMP0]], align 4
-; CHECK-NEXT: ret i32 [[B1]]
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32**
+; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[A]], align 4
+; CHECK-NEXT: [[C:%.*]] = ptrtoint i32* [[B]] to i32
+; CHECK-NEXT: ret i32 [[C]]
;
entry:
%a = bitcast i8* %x to i32**
@@ -85,9 +89,10 @@
define i64 @test6(i8* %x) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: entry:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8* [[X:%.*]] to i32*
-; CHECK-NEXT: [[B1:%.*]] = load i32, i32* [[TMP0]], align 4
-; CHECK-NEXT: [[C:%.*]] = zext i32 [[B1]] to i64
+; CHECK-NEXT: [[A:%.*]] = bitcast i8* [[X:%.*]] to i32**
+; CHECK-NEXT: [[B:%.*]] = load i32*, i32** [[A]], align 4
+; CHECK-NEXT: [[TMP0:%.*]] = ptrtoint i32* [[B]] to i32
+; CHECK-NEXT: [[C:%.*]] = zext i32 [[TMP0]] to i64
; CHECK-NEXT: ret i64 [[C]]
;
entry:
Index: llvm/test/Transforms/InstCombine/intptr1.ll
===================================================================
--- llvm/test/Transforms/InstCombine/intptr1.ll
+++ llvm/test/Transforms/InstCombine/intptr1.ll
@@ -7,12 +7,12 @@
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult float* [[A:%.*]], [[A_END:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.preheader:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i64* [[B_I64:%.*]] to float**
-; CHECK-NEXT: [[B1:%.*]] = load float*, float** [[TMP0]], align 8
+; CHECK-NEXT: [[B:%.*]] = load i64, i64* [[B_I64:%.*]], align 8
+; CHECK-NEXT: [[B_PTR:%.*]] = inttoptr i64 [[B]] to float*
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[A_ADDR_03:%.*]] = phi float* [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ], [ [[A]], [[FOR_BODY_PREHEADER]] ]
-; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B1]], [[FOR_BODY_PREHEADER]] ]
+; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B_PTR]], [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[B_ADDR_02_PTR]], align 4
; CHECK-NEXT: [[MUL_I:%.*]] = fmul float [[TMP1]], 4.200000e+01
; CHECK-NEXT: store float [[MUL_I]], float* [[A_ADDR_03]], align 4
@@ -114,11 +114,13 @@
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult float* [[A:%.*]], [[A_END:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.preheader:
-; CHECK-NEXT: [[B1:%.*]] = load float*, float** [[B_FLOAT:%.*]], align 8
+; CHECK-NEXT: [[B_I64:%.*]] = bitcast float** [[B_FLOAT:%.*]] to i64*
+; CHECK-NEXT: [[B:%.*]] = load i64, i64* [[B_I64]], align 8
+; CHECK-NEXT: [[B_PTR:%.*]] = inttoptr i64 [[B]] to float*
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[A_ADDR_03:%.*]] = phi float* [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ], [ [[A]], [[FOR_BODY_PREHEADER]] ]
-; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B1]], [[FOR_BODY_PREHEADER]] ]
+; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B_PTR]], [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[B_ADDR_02_PTR]], align 4
; CHECK-NEXT: [[MUL_I:%.*]] = fmul float [[TMP1]], 4.200000e+01
; CHECK-NEXT: store float [[MUL_I]], float* [[A_ADDR_03]], align 4
@@ -164,12 +166,13 @@
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult float* [[A:%.*]], [[A_END:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.preheader:
-; CHECK-NEXT: [[TMP0:%.*]] = bitcast i8** [[B_I8P:%.*]] to float**
-; CHECK-NEXT: [[B1:%.*]] = load float*, float** [[TMP0]], align 8
+; CHECK-NEXT: [[B_I64:%.*]] = bitcast i8** [[B_I8P:%.*]] to i64*
+; CHECK-NEXT: [[B:%.*]] = load i64, i64* [[B_I64]], align 8
+; CHECK-NEXT: [[B_PTR:%.*]] = inttoptr i64 [[B]] to float*
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[A_ADDR_03:%.*]] = phi float* [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ], [ [[A]], [[FOR_BODY_PREHEADER]] ]
-; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B1]], [[FOR_BODY_PREHEADER]] ]
+; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B_PTR]], [[FOR_BODY_PREHEADER]] ]
; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[B_ADDR_02_PTR]], align 4
; CHECK-NEXT: [[MUL_I:%.*]] = fmul float [[TMP1]], 4.200000e+01
; CHECK-NEXT: store float [[MUL_I]], float* [[A_ADDR_03]], align 4
@@ -215,15 +218,15 @@
; CHECK-NEXT: [[CMP1:%.*]] = icmp ult float* [[A:%.*]], [[A_END:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[FOR_BODY_PREHEADER:%.*]], label [[FOR_END:%.*]]
; CHECK: for.body.preheader:
-; CHECK-NEXT: [[B_F12:%.*]] = load float*, float** [[B_FLOAT:%.*]], align 8
+; CHECK-NEXT: [[B_F:%.*]] = load float*, float** [[B_FLOAT:%.*]], align 8
; CHECK-NEXT: br label [[FOR_BODY:%.*]]
; CHECK: for.body:
; CHECK-NEXT: [[A_ADDR_03:%.*]] = phi float* [ [[INCDEC_PTR:%.*]], [[FOR_BODY]] ], [ [[A]], [[FOR_BODY_PREHEADER]] ]
-; CHECK-NEXT: [[B_ADDR_02_PTR:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B_F12]], [[FOR_BODY_PREHEADER]] ]
-; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[B_ADDR_02_PTR]], align 4
+; CHECK-NEXT: [[B_ADDR_02_IN:%.*]] = phi float* [ [[ADD:%.*]], [[FOR_BODY]] ], [ [[B_F]], [[FOR_BODY_PREHEADER]] ]
+; CHECK-NEXT: [[TMP1:%.*]] = load float, float* [[B_ADDR_02_IN]], align 4
; CHECK-NEXT: [[MUL_I:%.*]] = fmul float [[TMP1]], 4.200000e+01
; CHECK-NEXT: store float [[MUL_I]], float* [[A_ADDR_03]], align 4
-; CHECK-NEXT: [[ADD]] = getelementptr inbounds float, float* [[B_ADDR_02_PTR]], i64 1
+; CHECK-NEXT: [[ADD]] = getelementptr inbounds float, float* [[B_ADDR_02_IN]], i64 1
; CHECK-NEXT: [[INCDEC_PTR]] = getelementptr inbounds float, float* [[A_ADDR_03]], i64 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult float* [[INCDEC_PTR]], [[A_END]]
; CHECK-NEXT: br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_END]]
Index: llvm/test/Transforms/InstCombine/PR30597.ll
===================================================================
--- llvm/test/Transforms/InstCombine/PR30597.ll
+++ llvm/test/Transforms/InstCombine/PR30597.ll
@@ -23,9 +23,9 @@
define i64* @function(i64* noalias nocapture readonly dereferenceable(8)) {
; CHECK-LABEL: @function(
; CHECK-NEXT: entry-block:
-; CHECK-NEXT: [[TMP1:%.*]] = bitcast i64* [[TMP0:%.*]] to i64**
-; CHECK-NEXT: [[LOADED1:%.*]] = load i64*, i64** [[TMP1]], align 8, !nonnull !0
-; CHECK-NEXT: ret i64* [[LOADED1]]
+; CHECK-NEXT: [[LOADED:%.*]] = load i64, i64* [[TMP0:%.*]], align 8, [[RNG0:!range !.*]]
+; CHECK-NEXT: [[INTTOPTR:%.*]] = inttoptr i64 [[LOADED]] to i64*
+; CHECK-NEXT: ret i64* [[INTTOPTR]]
;
entry-block:
%loaded = load i64, i64* %0, align 8, !range !1
Index: llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
===================================================================
--- llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
+++ llvm/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp
@@ -557,12 +557,12 @@
const DataLayout &DL = IC.getDataLayout();
// Fold away bit casts of the loaded value by loading the desired type.
- // We can do this for BitCastInsts as well as casts from and to pointer types,
- // as long as those are noops (i.e., the source or dest type have the same
- // bitwidth as the target's pointers).
+ // Note that we should not do this for pointer<->integer casts,
+ // because that would result in type punning.
if (LI.hasOneUse())
if (auto* CI = dyn_cast<CastInst>(LI.user_back()))
- if (CI->isNoopCast(DL))
+ if (CI->isNoopCast(DL) && LI.getType()->isPtrOrPtrVectorTy() ==
+ CI->getDestTy()->isPtrOrPtrVectorTy())
if (!LI.isAtomic() || isSupportedAtomicType(CI->getDestTy())) {
LoadInst *NewLoad = IC.combineLoadToNewType(LI, CI->getDestTy());
CI->replaceAllUsesWith(NewLoad);
Index: clang/test/CodeGen/arm64_32-vaarg.c
===================================================================
--- clang/test/CodeGen/arm64_32-vaarg.c
+++ clang/test/CodeGen/arm64_32-vaarg.c
@@ -27,20 +27,20 @@
// Minimum slot size is 4 bytes, so address needs rounding up to multiple of 8.
long long test_longlong(OneLongLong input, va_list *mylist) {
-// CHECK-LABEL: define i64 @test_longlong(i64 %input
-// CHECK: [[STARTPTR:%.*]] = bitcast i8** %mylist to i32*
-// CHECK: [[START:%.*]] = load i32, i32* [[STARTPTR]]
-
-// CHECK: [[ALIGN_TMP:%.*]] = add i32 [[START]], 7
-// CHECK: [[ALIGNED:%.*]] = and i32 [[ALIGN_TMP]], -8
-// CHECK: [[ALIGNED_ADDR:%.*]] = inttoptr i32 [[ALIGNED]] to i8*
-// CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[ALIGNED_ADDR]], i32 8
-// CHECK: store i8* [[NEXT]], i8** %mylist
-
-// CHECK: [[ADDR_STRUCT:%.*]] = inttoptr i32 [[ALIGNED]] to %struct.OneLongLong*
-// CHECK: [[ADDR_I64:%.*]] = getelementptr inbounds %struct.OneLongLong, %struct.OneLongLong* [[ADDR_STRUCT]], i32 0, i32 0
-// CHECK: [[RES:%.*]] = load i64, i64* [[ADDR_I64]]
-// CHECK: ret i64 [[RES]]
+ // CHECK-LABEL: define i64 @test_longlong(i64 %input
+ // CHECK: [[STARTPTR:%.*]] = load i8*, i8** %mylist
+ // CHECK: [[START:%.*]] = ptrtoint i8* [[STARTPTR]] to i32
+
+ // CHECK: [[ALIGN_TMP:%.*]] = add i32 [[START]], 7
+ // CHECK: [[ALIGNED:%.*]] = and i32 [[ALIGN_TMP]], -8
+ // CHECK: [[ALIGNED_ADDR:%.*]] = inttoptr i32 [[ALIGNED]] to i8*
+ // CHECK: [[NEXT:%.*]] = getelementptr inbounds i8, i8* [[ALIGNED_ADDR]], i32 8
+ // CHECK: store i8* [[NEXT]], i8** %mylist
+
+ // CHECK: [[ADDR_STRUCT:%.*]] = inttoptr i32 [[ALIGNED]] to %struct.OneLongLong*
+ // CHECK: [[ADDR_I64:%.*]] = getelementptr inbounds %struct.OneLongLong, %struct.OneLongLong* [[ADDR_STRUCT]], i32 0, i32 0
+ // CHECK: [[RES:%.*]] = load i64, i64* [[ADDR_I64]]
+ // CHECK: ret i64 [[RES]]
return va_arg(*mylist, OneLongLong).a;
}
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