mirror of
https://github.com/c64scene-ar/llvm-6502.git
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e2995ff88f
Minor enhancement to use 'tbz' for i1 compare-and-branch to get rid of an 'and' instruction. This fixes rdar://problem/18784953. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220712 91177308-0d34-0410-b5e6-96231b3b80d8
71 lines
1.4 KiB
LLVM
71 lines
1.4 KiB
LLVM
; RUN: llc -fast-isel -fast-isel-abort -aarch64-atomic-cfg-tidy=0 -verify-machineinstrs -mtriple=aarch64-apple-darwin < %s | FileCheck %s
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define i32 @icmp_eq_i1(i1 %a) {
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; CHECK-LABEL: icmp_eq_i1
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; CHECK: tbz w0, #0, {{LBB.+_2}}
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%1 = icmp eq i1 %a, 0
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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define i32 @icmp_eq_i8(i8 %a) {
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; CHECK-LABEL: icmp_eq_i8
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; CHECK: uxtb [[REG:w[0-9]+]], w0
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; CHECK: cbz [[REG]], {{LBB.+_2}}
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%1 = icmp eq i8 %a, 0
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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define i32 @icmp_eq_i16(i16 %a) {
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; CHECK-LABEL: icmp_eq_i16
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; CHECK: uxth [[REG:w[0-9]+]], w0
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; CHECK: cbz [[REG]], {{LBB.+_2}}
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%1 = icmp eq i16 %a, 0
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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define i32 @icmp_eq_i32(i32 %a) {
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; CHECK-LABEL: icmp_eq_i32
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; CHECK: cbz w0, {{LBB.+_2}}
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%1 = icmp eq i32 %a, 0
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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define i32 @icmp_eq_i64(i64 %a) {
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; CHECK-LABEL: icmp_eq_i64
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; CHECK: cbz x0, {{LBB.+_2}}
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%1 = icmp eq i64 %a, 0
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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define i32 @icmp_eq_ptr(i8* %a) {
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; CHECK-LABEL: icmp_eq_ptr
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; CHECK: cbz x0, {{LBB.+_2}}
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%1 = icmp eq i8* %a, null
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br i1 %1, label %bb1, label %bb2
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bb2:
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ret i32 1
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bb1:
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ret i32 0
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}
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