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[mips] Use early exit in MipsAsmParser::matchCPURegisterName(). NFC.

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Patch by Vasileios Kalintiris.

Differential Revision: http://reviews.llvm.org/D5270



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@217774 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Toma Tabacu 2014-09-15 15:33:01 +00:00
parent fcc1a51d3d
commit fa13b44206
1 changed files with 17 additions and 16 deletions
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33
lib/Target/Mips/AsmParser/MipsAsmParser.cpp
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@ -1657,23 +1657,24 @@ int MipsAsmParser::matchCPURegisterName(StringRef Name) {
.Case("t9", 25)
.Default(-1);
if (isABI_N32() || isABI_N64()) {
// Although SGI documentation just cuts out t0-t3 for n32/n64,
// GNU pushes the values of t0-t3 to override the o32/o64 values for t4-t7
// We are supporting both cases, so for t0-t3 we'll just push them to t4-t7.
if (8 <= CC && CC <= 11)
CC += 4;
if (!(isABI_N32() || isABI_N64()))
return CC;
if (CC == -1)
CC = StringSwitch<unsigned>(Name)
.Case("a4", 8)
.Case("a5", 9)
.Case("a6", 10)
.Case("a7", 11)
.Case("kt0", 26)
.Case("kt1", 27)
.Default(-1);
}
// Although SGI documentation just cuts out t0-t3 for n32/n64,
// GNU pushes the values of t0-t3 to override the o32/o64 values for t4-t7
// We are supporting both cases, so for t0-t3 we'll just push them to t4-t7.
if (8 <= CC && CC <= 11)
CC += 4;
if (CC == -1)
CC = StringSwitch<unsigned>(Name)
.Case("a4", 8)
.Case("a5", 9)
.Case("a6", 10)
.Case("a7", 11)
.Case("kt0", 26)
.Case("kt1", 27)
.Default(-1);
return CC;
}