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[X86] Add PR37025 test coverage

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Simon Pilgrim 2021-07-27 12:09:10 +01:00
parent e1c8650040
commit a99adc793b
1 changed files with 125 additions and 0 deletions
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test/CodeGen/X86/pr37025.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
; PR37025
;
;#include <stdatomic.h>
;#include <stdbool.h>
;
;void func2();
;
;void func(_Atomic(unsigned long) * obj, void * obj2)
;{
; if (atomic_fetch_sub(obj, 1) == 1 && obj2)
; func2();
;}
define void @test_dec_select(i64* nocapture %0, i8* readnone %1) {
; CHECK-LABEL: test_dec_select:
; CHECK: # %bb.0:
; CHECK-NEXT: lock decq (%rdi)
; CHECK-NEXT: jne .LBB0_2
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: testq %rsi, %rsi
; CHECK-NEXT: je .LBB0_2
; CHECK-NEXT: # %bb.3:
; CHECK-NEXT: jmp func2 # TAILCALL
; CHECK-NEXT: .LBB0_2:
; CHECK-NEXT: retq
%3 = atomicrmw sub i64* %0, i64 1 seq_cst
%4 = icmp eq i64 %3, 1
%5 = icmp ne i8* %1, null
%6 = select i1 %4, i1 %5, i1 false
br i1 %6, label %7, label %8
7: ; preds = %2
tail call void @func2()
br label %8
8: ; preds = %7, %2
ret void
}
define void @test_dec_select_commute(i64* nocapture %0, i8* readnone %1) {
; CHECK-LABEL: test_dec_select_commute:
; CHECK: # %bb.0:
; CHECK-NEXT: movq $-1, %rax
; CHECK-NEXT: lock xaddq %rax, (%rdi)
; CHECK-NEXT: testq %rsi, %rsi
; CHECK-NEXT: je .LBB1_2
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: cmpq $1, %rax
; CHECK-NEXT: jne .LBB1_2
; CHECK-NEXT: # %bb.3:
; CHECK-NEXT: jmp func2 # TAILCALL
; CHECK-NEXT: .LBB1_2:
; CHECK-NEXT: retq
%3 = atomicrmw sub i64* %0, i64 1 seq_cst
%4 = icmp eq i64 %3, 1
%5 = icmp ne i8* %1, null
%6 = select i1 %5, i1 %4, i1 false
br i1 %6, label %7, label %8
7: ; preds = %2
tail call void @func2()
br label %8
8: ; preds = %7, %2
ret void
}
define void @test_dec_and(i64* nocapture %0, i8* readnone %1) {
; CHECK-LABEL: test_dec_and:
; CHECK: # %bb.0:
; CHECK-NEXT: movq $-1, %rax
; CHECK-NEXT: lock xaddq %rax, (%rdi)
; CHECK-NEXT: testq %rsi, %rsi
; CHECK-NEXT: je .LBB2_2
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: cmpq $1, %rax
; CHECK-NEXT: jne .LBB2_2
; CHECK-NEXT: # %bb.3:
; CHECK-NEXT: jmp func2 # TAILCALL
; CHECK-NEXT: .LBB2_2:
; CHECK-NEXT: retq
%3 = atomicrmw sub i64* %0, i64 1 seq_cst
%4 = icmp eq i64 %3, 1
%5 = icmp ne i8* %1, null
%6 = and i1 %5, %4
br i1 %6, label %7, label %8
7: ; preds = %2
tail call void @func2()
br label %8
8: ; preds = %7, %2
ret void
}
define void @test_dec_and_commute(i64* nocapture %0, i8* readnone %1) {
; CHECK-LABEL: test_dec_and_commute:
; CHECK: # %bb.0:
; CHECK-NEXT: lock decq (%rdi)
; CHECK-NEXT: jne .LBB3_2
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: testq %rsi, %rsi
; CHECK-NEXT: je .LBB3_2
; CHECK-NEXT: # %bb.3:
; CHECK-NEXT: jmp func2 # TAILCALL
; CHECK-NEXT: .LBB3_2:
; CHECK-NEXT: retq
%3 = atomicrmw sub i64* %0, i64 1 seq_cst
%4 = icmp eq i64 %3, 1
%5 = icmp ne i8* %1, null
%6 = and i1 %4, %5
br i1 %6, label %7, label %8
7: ; preds = %2
tail call void @func2()
br label %8
8: ; preds = %7, %2
ret void
}
declare dso_local void @func2()