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Hexagon: Removed asserts regarding alignment and offset.

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We are warning the user about the alignment, so we should not assert.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@177103 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jyotsna Verma 2013-03-14 19:08:03 +00:00
parent e2188d9c43
commit cec50e6da2
2 changed files with 20 additions and 5 deletions
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9
lib/Target/Hexagon/HexagonInstrInfo.cpp
View File

@ -1949,6 +1949,10 @@ isValidOffset(const int Opcode, const int Offset) const {
// the given "Opcode". If "Offset" is not in the correct range, "ADD_ri" is
// inserted to calculate the final address. Due to this reason, the function
// assumes that the "Offset" has correct alignment.
// We used to assert if the offset was not properly aligned, however,
// there are cases where a misaligned pointer recast can cause this
// problem, and we need to allow for it. The front end warns of such
// misaligns with respect to load size.
switch(Opcode) {
@ -1958,7 +1962,6 @@ isValidOffset(const int Opcode, const int Offset) const {
case Hexagon::STriw_indexed:
case Hexagon::STriw:
case Hexagon::STriw_f:
assert((Offset % 4 == 0) && "Offset has incorrect alignment");
return (Offset >= Hexagon_MEMW_OFFSET_MIN) &&
(Offset <= Hexagon_MEMW_OFFSET_MAX);
@ -1968,14 +1971,12 @@ isValidOffset(const int Opcode, const int Offset) const {
case Hexagon::STrid:
case Hexagon::STrid_indexed:
case Hexagon::STrid_f:
assert((Offset % 8 == 0) && "Offset has incorrect alignment");
return (Offset >= Hexagon_MEMD_OFFSET_MIN) &&
(Offset <= Hexagon_MEMD_OFFSET_MAX);
case Hexagon::LDrih:
case Hexagon::LDriuh:
case Hexagon::STrih:
assert((Offset % 2 == 0) && "Offset has incorrect alignment");
return (Offset >= Hexagon_MEMH_OFFSET_MIN) &&
(Offset <= Hexagon_MEMH_OFFSET_MAX);
@ -2002,7 +2003,6 @@ isValidOffset(const int Opcode, const int Offset) const {
case Hexagon::MEMw_SUBr_MEM_V4 :
case Hexagon::MEMw_ANDr_MEM_V4 :
case Hexagon::MEMw_ORr_MEM_V4 :
assert ((Offset % 4) == 0 && "MEMOPw offset is not aligned correctly." );
return (0 <= Offset && Offset <= 255);
case Hexagon::MEMh_ADDi_indexed_MEM_V4 :
@ -2017,7 +2017,6 @@ isValidOffset(const int Opcode, const int Offset) const {
case Hexagon::MEMh_SUBr_MEM_V4 :
case Hexagon::MEMh_ANDr_MEM_V4 :
case Hexagon::MEMh_ORr_MEM_V4 :
assert ((Offset % 2) == 0 && "MEMOPh offset is not aligned correctly." );
return (0 <= Offset && Offset <= 127);
case Hexagon::MEMb_ADDi_indexed_MEM_V4 :

16
test/CodeGen/Hexagon/misaligned-access.ll Normal file
View File

@ -0,0 +1,16 @@
; RUN: llc -march=hexagon -mcpu=hexagonv4 < %s
; Check that the mis-aligned load doesn't cause compiler to assert.
declare i32 @_hi(i64) #1
@temp1 = common global i32 0, align 4
define i32 @CSDRSEARCH_executeSearchManager() #0 {
entry:
%temp = alloca i32, align 4
%0 = load i32* @temp1, align 4
store i32 %0, i32* %temp, align 4
%1 = bitcast i32* %temp to i64*
%2 = load i64* %1, align 8
%call = call i32 @_hi(i64 %2)
ret i32 %call
}