mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-22 10:29:35 +00:00
7b837d8c75
This adds a second implementation of the AArch64 architecture to LLVM, accessible in parallel via the "arm64" triple. The plan over the coming weeks & months is to merge the two into a single backend, during which time thorough code review should naturally occur. Everything will be easier with the target in-tree though, hence this commit. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205090 91177308-0d34-0410-b5e6-96231b3b80d8
59 lines
1.5 KiB
LLVM
59 lines
1.5 KiB
LLVM
; RUN: llc -arm64-extr-generation=true -verify-machineinstrs < %s \
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; RUN: -march=arm64 | FileCheck %s
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define i64 @ror_i64(i64 %in) {
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; CHECK-LABEL: ror_i64:
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%left = shl i64 %in, 19
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%right = lshr i64 %in, 45
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%val5 = or i64 %left, %right
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; CHECK: extr {{x[0-9]+}}, x0, x0, #45
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ret i64 %val5
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}
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define i32 @ror_i32(i32 %in) {
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; CHECK-LABEL: ror_i32:
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%left = shl i32 %in, 9
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%right = lshr i32 %in, 23
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%val5 = or i32 %left, %right
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; CHECK: extr {{w[0-9]+}}, w0, w0, #23
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ret i32 %val5
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}
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define i32 @extr_i32(i32 %lhs, i32 %rhs) {
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; CHECK-LABEL: extr_i32:
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%left = shl i32 %lhs, 6
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%right = lshr i32 %rhs, 26
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%val = or i32 %left, %right
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; Order of lhs and rhs matters here. Regalloc would have to be very odd to use
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; something other than w0 and w1.
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; CHECK: extr {{w[0-9]+}}, w0, w1, #26
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ret i32 %val
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}
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define i64 @extr_i64(i64 %lhs, i64 %rhs) {
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; CHECK-LABEL: extr_i64:
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%right = lshr i64 %rhs, 40
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%left = shl i64 %lhs, 24
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%val = or i64 %right, %left
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; Order of lhs and rhs matters here. Regalloc would have to be very odd to use
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; something other than w0 and w1.
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; CHECK: extr {{x[0-9]+}}, x0, x1, #40
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ret i64 %val
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}
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; Regression test: a bad experimental pattern crept into git which optimised
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; this pattern to a single EXTR.
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define i32 @extr_regress(i32 %a, i32 %b) {
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; CHECK-LABEL: extr_regress:
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%sh1 = shl i32 %a, 14
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%sh2 = lshr i32 %b, 14
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%val = or i32 %sh2, %sh1
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; CHECK-NOT: extr {{w[0-9]+}}, {{w[0-9]+}}, {{w[0-9]+}}, #{{[0-9]+}}
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ret i32 %val
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; CHECK: ret
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}
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