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add a test for D77524

This commit is contained in:
Juneyoung Lee 2020-05-21 10:03:27 +09:00
parent ca85d5a848
commit 58f7c938a1
1 changed files with 59 additions and 0 deletions
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59
llvm/test/Transforms/CanonicalizeFreezeInLoops/aarch64.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=arm64-unknown-unknown -O3 < %s | FileCheck %s
; This test should show that @f and @f_without_freeze generate equivalent
; assembly
; REQUIRES: aarch64-registered-target
define void @f(i8* %p, i32 %n, i32 %m) {
; CHECK-LABEL: f:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: mov w8, #1
; CHECK-NEXT: .LBB0_1: // %loop
; CHECK-NEXT: // =>This Inner Loop Header: Depth=1
; CHECK-NEXT: add w9, w2, w8
; CHECK-NEXT: cmp w8, w1
; CHECK-NEXT: add w8, w8, #1 // =1
; CHECK-NEXT: strb wzr, [x0, w9, sxtw]
; CHECK-NEXT: b.ne .LBB0_1
; CHECK-NEXT: // %bb.2: // %exit
; CHECK-NEXT: ret
entry:
br label %loop
loop:
%i = phi i32 [0, %entry], [%i.next, %loop]
%i.next = add i32 %i, 1
%i.next.fr = freeze i32 %i.next
%j = add i32 %m, %i.next.fr
%q = getelementptr i8, i8* %p, i32 %j
store i8 0, i8* %q
%cond = icmp eq i32 %i.next.fr, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}
define void @f_without_freeze(i8* %p, i32 %n, i32 %m) {
; CHECK-LABEL: f_without_freeze:
; CHECK: // %bb.0: // %entry
; CHECK-NEXT: add w8, w2, #1 // =1
; CHECK-NEXT: .LBB1_1: // %loop
; CHECK-NEXT: // =>This Inner Loop Header: Depth=1
; CHECK-NEXT: strb wzr, [x0, w8, sxtw]
; CHECK-NEXT: subs w1, w1, #1 // =1
; CHECK-NEXT: add w8, w8, #1 // =1
; CHECK-NEXT: b.ne .LBB1_1
; CHECK-NEXT: // %bb.2: // %exit
; CHECK-NEXT: ret
entry:
br label %loop
loop:
%i = phi i32 [0, %entry], [%i.next, %loop]
%i.next = add i32 %i, 1
%j = add i32 %m, %i.next
%q = getelementptr i8, i8* %p, i32 %j
store i8 0, i8* %q
%cond = icmp eq i32 %i.next, %n
br i1 %cond, label %exit, label %loop
exit:
ret void
}