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https://github.com/c64scene-ar/llvm-6502.git
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to an add or a sub. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98059 91177308-0d34-0410-b5e6-96231b3b80d8
68 lines
1.6 KiB
LLVM
68 lines
1.6 KiB
LLVM
; RUN: llvm-as < %s | llc -march=xcore | FileCheck %s
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; Only needs one ladd
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define i64 @f1(i32 %x, i32 %y) nounwind {
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entry:
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%0 = zext i32 %x to i64 ; <i64> [#uses=1]
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%1 = zext i32 %y to i64 ; <i64> [#uses=1]
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%2 = add i64 %1, %0 ; <i64> [#uses=1]
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ret i64 %2
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}
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; CHECK: f1:
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; CHECK: ldc r2, 0
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; CHECK-NEXT: ladd r1, r0, r1, r0, r2
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; CHECK-NEXT: retsp 0
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; Only needs one lsub and one neg
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define i64 @f2(i32 %x, i32 %y) nounwind {
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entry:
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%0 = zext i32 %x to i64 ; <i64> [#uses=1]
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%1 = zext i32 %y to i64 ; <i64> [#uses=1]
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%2 = sub i64 %1, %0 ; <i64> [#uses=1]
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ret i64 %2
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}
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; CHECK: f2:
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; CHECK: ldc r2, 0
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; CHECK-NEXT: lsub r1, r0, r1, r0, r2
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; CHECK-NEXT: neg r1, r1
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; CHECK-NEXT: retsp 0
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; Should compile to one ladd and one add
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define i64 @f3(i64 %x, i32 %y) nounwind {
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entry:
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%0 = zext i32 %y to i64 ; <i64> [#uses=1]
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%1 = add i64 %x, %0 ; <i64> [#uses=1]
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ret i64 %1
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}
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; CHECK: f3:
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; CHECK: ldc r3, 0
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; CHECK-NEXT: ladd r2, r0, r0, r2, r3
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; CHECK-NEXT: add r1, r1, r2
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; CHECK-NEXT: retsp 0
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; Should compile to one ladd and one add
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define i64 @f4(i32 %x, i64 %y) nounwind {
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entry:
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%0 = zext i32 %x to i64 ; <i64> [#uses=1]
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%1 = add i64 %0, %y ; <i64> [#uses=1]
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ret i64 %1
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}
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; CHECK: f4:
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; CHECK: ldc r3, 0
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; CHECK-NEXT: ladd r1, r0, r0, r1, r3
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; CHECK-NEXT: add r1, r2, r1
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; CHECK-NEXT: retsp 0
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; Should compile to one lsub and one sub
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define i64 @f5(i64 %x, i32 %y) nounwind {
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entry:
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%0 = zext i32 %y to i64 ; <i64> [#uses=1]
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%1 = sub i64 %x, %0 ; <i64> [#uses=1]
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ret i64 %1
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}
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; CHECK: f5:
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; CHECK: ldc r3, 0
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; CHECK-NEXT: lsub r2, r0, r0, r2, r3
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; CHECK-NEXT: sub r1, r1, r2
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; CHECK-NEXT: retsp 0
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