mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-04 22:29:22 +00:00
00a99a3584
only run for x86 with fastisel. I've found it being very effective in eliminating some obvious dead code as result of formal parameter lowering especially when tail call optimization eliminated the need for some of the loads from fixed frame objects. It also shrinks a number of the tests. A couple of tests no longer make sense and are now eliminated. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95493 91177308-0d34-0410-b5e6-96231b3b80d8
48 lines
1.1 KiB
LLVM
48 lines
1.1 KiB
LLVM
; RUN: llc < %s -march=arm | FileCheck %s
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define i64 @f0(i64 %A, i64 %B) {
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; CHECK: f0
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; CHECK: movs r3, r3, lsr #1
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; CHECK-NEXT: mov r2, r2, rrx
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; CHECK-NEXT: subs r0, r0, r2
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; CHECK-NEXT: sbc r1, r1, r3
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%tmp = bitcast i64 %A to i64
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%tmp2 = lshr i64 %B, 1
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%tmp3 = sub i64 %tmp, %tmp2
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ret i64 %tmp3
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}
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define i32 @f1(i64 %x, i64 %y) {
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; CHECK: f1
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; CHECK: mov r0, r0, lsl r2
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%a = shl i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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define i32 @f2(i64 %x, i64 %y) {
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; CHECK: f2
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; CHECK: mov r0, r0, lsr r2
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; CHECK-NEXT: rsb r12, r2, #32
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; CHECK-NEXT: sub r2, r2, #32
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; CHECK-NEXT: cmp r2, #0
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; CHECK-NEXT: orr r0, r0, r1, lsl r12
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; CHECK-NEXT: movge r0, r1, asr r2
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%a = ashr i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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define i32 @f3(i64 %x, i64 %y) {
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; CHECK: f3
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; CHECK: mov r0, r0, lsr r2
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; CHECK-NEXT: rsb r12, r2, #32
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; CHECK-NEXT: sub r2, r2, #32
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; CHECK-NEXT: cmp r2, #0
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; CHECK-NEXT: orr r0, r0, r1, lsl r12
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; CHECK-NEXT: movge r0, r1, lsr r2
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%a = lshr i64 %x, %y
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%b = trunc i64 %a to i32
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ret i32 %b
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}
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