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[lanai] isBrImm should accept any non-constant immediate.

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isBrImm should accept any non-constant immediate. Previously it was only accepting LanaiMCExpr ones which was wrong.

Differential Revision: http://reviews.llvm.org/D18571



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@265032 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jacques Pienaar 2016-03-31 17:58:55 +00:00
parent 54993bc649
commit 1372b02d63
2 changed files with 19 additions and 17 deletions
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23
lib/Target/Lanai/AsmParser/LanaiAsmParser.cpp
View File

@ -195,23 +195,12 @@ public:
return false;
// Constant case
if (const MCConstantExpr *ConstExpr = dyn_cast<MCConstantExpr>(Imm.Value)) {
int64_t Value = ConstExpr->getValue();
// Check if value fits in 25 bits with 2 least significant bits 0.
return isShiftedUInt<23, 2>(static_cast<int32_t>(Value));
}
// Symbolic reference expression
if (const LanaiMCExpr *SymbolRefExpr = dyn_cast<LanaiMCExpr>(Imm.Value))
return SymbolRefExpr->getKind() == LanaiMCExpr::VK_Lanai_None;
// Binary expression
if (const MCBinaryExpr *BinaryExpr = dyn_cast<MCBinaryExpr>(Imm.Value))
if (const LanaiMCExpr *SymbolRefExpr =
dyn_cast<LanaiMCExpr>(BinaryExpr->getLHS()))
return SymbolRefExpr->getKind() == LanaiMCExpr::VK_Lanai_None;
return false;
const MCConstantExpr *MCE = dyn_cast<MCConstantExpr>(Imm.Value);
if (!MCE)
return true;
int64_t Value = MCE->getValue();
// Check if value fits in 25 bits with 2 least significant bits 0.
return isShiftedUInt<23, 2>(static_cast<int32_t>(Value));
}
bool isBrTarget() { return isBrImm() || isToken(); }

13
test/MC/Lanai/ctrl-instructions.s Normal file
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@ -0,0 +1,13 @@
// RUN: llvm-mc -triple lanai-unknown-unknown -show-encoding -o - %s | FileCheck %s
// CHECK: bt .Ltmp0 ! encoding: [0b1110000A,A,A,A]
// CHECK-NEXT: ! fixup A - offset: 0, value: .Ltmp0, kind: FIXUP_LANAI_25
bt 1f
nop
1:
// CHECK: bt foo ! encoding: [0b1110000A,A,A,A]
// CHECK-NEXT: ! fixup A - offset: 0, value: foo, kind: FIXUP_LANAI_25
bt foo
nop