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https://github.com/c64scene-ar/llvm-6502.git
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055d207426
Incremental improvement to fast-isel for PPC64. This allows us to select on ret, sext, and zext. Filling in sext/zext improves some of the existing logic in handling compare-immediates that needed extends. A simplified return convention for fast-isel is also added to the PPC64 calling conventions. All call/return processing for DAG selection is handled with custom code, so there isn't an existing CC to rely on here. The include of PPCGenCallingConv.inc causes compiler warnings due to the 32-bit calling conventions that are not used, so the dummy function "usePPC32CCs()" is added here to silence those. Test cases for the return and extend logic are added. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189266 91177308-0d34-0410-b5e6-96231b3b80d8
76 lines
1.5 KiB
LLVM
76 lines
1.5 KiB
LLVM
; RUN: llc < %s -O0 -verify-machineinstrs -fast-isel-abort -mtriple=powerpc64-unknown-linux-gnu -mcpu=pwr7 | FileCheck %s --check-prefix=ELF64
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; zext
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define i32 @zext_8_32(i8 %a) nounwind ssp {
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; ELF64: zext_8_32
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%r = zext i8 %a to i32
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; ELF64: rlwinm {{[0-9]+}}, {{[0-9]+}}, 0, 24, 31
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ret i32 %r
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}
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define i32 @zext_16_32(i16 %a) nounwind ssp {
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; ELF64: zext_16_32
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%r = zext i16 %a to i32
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; ELF64: rlwinm {{[0-9]+}}, {{[0-9]+}}, 0, 16, 31
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ret i32 %r
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}
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define i64 @zext_8_64(i8 %a) nounwind ssp {
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; ELF64: zext_8_64
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%r = zext i8 %a to i64
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; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 56
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ret i64 %r
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}
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define i64 @zext_16_64(i16 %a) nounwind ssp {
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; ELF64: zext_16_64
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%r = zext i16 %a to i64
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; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 48
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ret i64 %r
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}
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define i64 @zext_32_64(i32 %a) nounwind ssp {
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; ELF64: zext_32_64
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%r = zext i32 %a to i64
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; ELF64: rldicl {{[0-9]+}}, {{[0-9]+}}, 0, 32
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ret i64 %r
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}
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; sext
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define i32 @sext_8_32(i8 %a) nounwind ssp {
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; ELF64: sext_8_32
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%r = sext i8 %a to i32
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; ELF64: extsb
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ret i32 %r
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}
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define i32 @sext_16_32(i16 %a) nounwind ssp {
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; ELF64: sext_16_32
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%r = sext i16 %a to i32
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; ELF64: extsh
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ret i32 %r
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}
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define i64 @sext_8_64(i8 %a) nounwind ssp {
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; ELF64: sext_8_64
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%r = sext i8 %a to i64
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; ELF64: extsb
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ret i64 %r
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}
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define i64 @sext_16_64(i16 %a) nounwind ssp {
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; ELF64: sext_16_64
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%r = sext i16 %a to i64
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; ELF64: extsh
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ret i64 %r
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}
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define i64 @sext_32_64(i32 %a) nounwind ssp {
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; ELF64: sext_32_64
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%r = sext i32 %a to i64
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; ELF64: extsw
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ret i64 %r
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}
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