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llvm-project/llvm/test/CodeGen/Generic/2010-11-04-BigByval.ll

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When passing a huge parameter using the byval mechanism, a long sequence of loads and stores was being generated to perform the copy on the x86 targets if the parameter was less than 4 byte aligned, causing llc to use up vast amounts of memory and time. Use a "rep movs" form instead. PR7170. llvm-svn: 118260
2010-11-05 05:16:46 +08:00
; RUN: llc < %s
; PR7170
%big = type [131072 x i8]
OpaquePtr: Bulk update tests to use typed byval Upgrade of the IR text tests should be the only thing blocking making typed byval mandatory. Partially done through regex and partially manual.
2020-11-20 23:52:27 +08:00
declare void @foo(%big* byval(%big) align 1)
When passing a huge parameter using the byval mechanism, a long sequence of loads and stores was being generated to perform the copy on the x86 targets if the parameter was less than 4 byte aligned, causing llc to use up vast amounts of memory and time. Use a "rep movs" form instead. PR7170. llvm-svn: 118260
2010-11-05 05:16:46 +08:00
OpaquePtr: Bulk update tests to use typed byval Upgrade of the IR text tests should be the only thing blocking making typed byval mandatory. Partially done through regex and partially manual.
2020-11-20 23:52:27 +08:00
define void @bar(%big* byval(%big) align 1 %x) {
call void @foo(%big* byval(%big) align 1 %x)
When passing a huge parameter using the byval mechanism, a long sequence of loads and stores was being generated to perform the copy on the x86 targets if the parameter was less than 4 byte aligned, causing llc to use up vast amounts of memory and time. Use a "rep movs" form instead. PR7170. llvm-svn: 118260
2010-11-05 05:16:46 +08:00
ret void
}