llvm-mirror/combine-lds.ll at 8f86bb4d20a402dc92aefb508f306be22ee3ff08 - llvm-mirror - Git.je (Gitea)

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Evan Cheng bd15e330d0 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.

llvm-svn: 55807

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

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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
 }