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[X86] Fix assertion while DAG combining offsets and ExternalSymbols

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ExternalSymbol nodes do not contain offsets, unlike GlobalValue nodes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@236471 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner 2015-05-04 23:22:36 +00:00
parent 8737acdac2
commit c5315e5d05
2 changed files with 21 additions and 8 deletions
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5
lib/Target/X86/X86ISelDAGToDAG.cpp
View File

@ -603,6 +603,9 @@ static bool isDispSafeForFrameIndex(int64_t Val) {
bool X86DAGToDAGISel::FoldOffsetIntoAddress(uint64_t Offset,
X86ISelAddressMode &AM) {
// Cannot combine ExternalSymbol displacements with integer offsets.
if (Offset != 0 && AM.ES)
return true;
int64_t Val = AM.Disp + Offset;
CodeModel::Model M = TM.getCodeModel();
if (Subtarget->is64Bit()) {
@ -1009,7 +1012,7 @@ bool X86DAGToDAGISel::MatchAddressRecursively(SDValue N, X86ISelAddressMode &AM,
switch (N.getOpcode()) {
default: break;
case ISD::FRAME_ALLOC_RECOVER: {
if (!AM.hasSymbolicDisplacement())
if (!AM.hasSymbolicDisplacement() && AM.Disp == 0)
if (const auto *ESNode = dyn_cast<ExternalSymbolSDNode>(N.getOperand(0)))
if (ESNode->getOpcode() == ISD::TargetExternalSymbol) {
// Use the symbol and don't prefix it.

24
test/CodeGen/X86/frameescape.ll
View File

@ -18,6 +18,9 @@ define void @print_framealloc_from_fp(i8* %fp) {
%b.val = load i32, i32* %b
call i32 (i8*, ...) @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %b.val)
store i32 42, i32* %b
%b2 = getelementptr i32, i32* %b, i32 1
%b2.val = load i32, i32* %b2
call i32 (i8*, ...) @printf(i8* getelementptr ([10 x i8], [10 x i8]* @str, i32 0, i32 0), i32 %b2.val)
ret void
}
@ -46,13 +49,18 @@ define void @print_framealloc_from_fp(i8* %fp) {
; X86: movl $_str, (%esp)
; X86: calll _printf
; X86: movl $42, Lalloc_func$frame_escape_1(%esi)
; X86: movl $4, %eax
; X86: movl Lalloc_func$frame_escape_1(%esi,%eax), %eax
; X86: movl %eax, 4(%esp)
; X86: movl $_str, (%esp)
; X86: calll _printf
; X86: addl $8, %esp
; X86: popl %esi
; X86: retl
define void @alloc_func() {
%a = alloca i32
%b = alloca i32
%b = alloca i32, i32 2
call void (...) @llvm.frameescape(i32* %a, i32* %b)
store i32 42, i32* %a
store i32 13, i32* %b
@ -67,9 +75,9 @@ define void @alloc_func() {
; X64: leaq 48(%rsp), %rbp
; X64: .seh_setframe 5, 48
; X64: .Lalloc_func$frame_escape_0 = 44
; X64: .Lalloc_func$frame_escape_1 = 40
; X64: .Lalloc_func$frame_escape_1 = 36
; X64: movl $42, -4(%rbp)
; X64: movl $13, -8(%rbp)
; X64: movl $13, -12(%rbp)
; X64: leaq -48(%rbp), %rcx
; X64: callq print_framealloc_from_fp
; X64: retq
@ -77,14 +85,14 @@ define void @alloc_func() {
; X86-LABEL: alloc_func:
; X86: pushl %ebp
; X86: movl %esp, %ebp
; X86: subl $12, %esp
; X86: subl $16, %esp
; X86: Lalloc_func$frame_escape_0 = -4
; X86: Lalloc_func$frame_escape_1 = -8
; X86: Lalloc_func$frame_escape_1 = -12
; X86: movl $42, -4(%ebp)
; X86: movl $13, -8(%ebp)
; X86: movl $13, -12(%ebp)
; X86: movl %ebp, (%esp)
; X86: calll _print_framealloc_from_fp
; X86: addl $12, %esp
; X86: addl $16, %esp
; X86: popl %ebp
; X86: retl
@ -116,3 +124,5 @@ define void @alloc_func_no_frameaddr() {
; X64: callq print_framealloc_from_fp
; X64: addq $40, %rsp
; X64: retq
; X86-LABEL: alloc_func_no_frameaddr: