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27d8a0df16
This takes advanatage of the CBZ and CBNZ instruction to further optimize the common null check pattern into a single instruction. This is related to rdar://problem/18358882. llvm-svn: 217972
58 lines
1.1 KiB
LLVM
58 lines
1.1 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 signext %a) {
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; CHECK-LABEL: icmp_eq_i1
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; CHECK: cbz w0, {{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 signext %a) {
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; CHECK-LABEL: icmp_eq_i8
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; CHECK: cbz w0, {{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 signext %a) {
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; CHECK-LABEL: icmp_eq_i16
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; CHECK: cbz w0, {{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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