llvm-6502/combine-lds.ll at af3f5441b51c5f5317a585c816201e16b46891c6 - llvm-6502 - Applefritter: Git

6502/llvm-6502

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Evan Cheng 4a03775777 For whatever the reason, x86 CallingConv::Fast (i.e. fastcc) was not passing scalar arguments in registers. This patch defines a new fastcc CC which is slightly different from the FastCall CC. In addition to passing integer arguments in ECX and EDX, it also specify doubles are passed in 8-byte slots which are 8-byte aligned (instead of 4-byte aligned). This avoids a potential performance hazard where doubles span cacheline boundaries.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@55807 91177308-0d34-0410-b5e6-96231b3b80d8

2008-09-04 22:59:58 +00:00

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LLVM

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 ; RUN: llvm-as < %s | llc -march=x86 -mattr=+sse2 | grep fldl | count 1
 define double @doload64(i64 %x) nounwind  {
 	%tmp717 = bitcast i64 %x to double
 	ret double %tmp717
 }