a4951eca40
Changes in Recommit:
1) Fix non-determanism by using `SmallMapVector` instead of
`SmallPtrSet`.
2) Fix bug in dependency pruning where we discounted the actual
`and/or` combining the two conditions. This lead to over pruning.
Closes #81689
124 lines
2.9 KiB
LLVM
124 lines
2.9 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
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; PR37025
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;
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;#include <stdatomic.h>
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;#include <stdbool.h>
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;
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;void func2();
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;
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;void func(_Atomic(unsigned long) * obj, ptr obj2)
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;{
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; if (atomic_fetch_sub(obj, 1) == 1 && obj2)
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; func2();
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;}
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define void @test_dec_select(ptr nocapture %0, ptr readnone %1) {
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; CHECK-LABEL: test_dec_select:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lock decq (%rdi)
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: setne %cl
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; CHECK-NEXT: andb %al, %cl
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; CHECK-NEXT: cmpb $1, %cl
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; CHECK-NEXT: je func2 # TAILCALL
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; CHECK-NEXT: # %bb.1:
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; CHECK-NEXT: retq
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%3 = atomicrmw sub ptr %0, i64 1 seq_cst
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%4 = icmp eq i64 %3, 1
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%5 = icmp ne ptr %1, null
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%6 = select i1 %4, i1 %5, i1 false
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br i1 %6, label %7, label %8
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7: ; preds = %2
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tail call void @func2()
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br label %8
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8: ; preds = %7, %2
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ret void
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}
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define void @test_dec_select_commute(ptr nocapture %0, ptr readnone %1) {
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; CHECK-LABEL: test_dec_select_commute:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lock decq (%rdi)
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: setne %cl
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; CHECK-NEXT: andb %al, %cl
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; CHECK-NEXT: cmpb $1, %cl
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; CHECK-NEXT: je func2 # TAILCALL
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; CHECK-NEXT: # %bb.1:
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; CHECK-NEXT: retq
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%3 = atomicrmw sub ptr %0, i64 1 seq_cst
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%4 = icmp eq i64 %3, 1
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%5 = icmp ne ptr %1, null
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%6 = select i1 %5, i1 %4, i1 false
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br i1 %6, label %7, label %8
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7: ; preds = %2
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tail call void @func2()
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br label %8
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8: ; preds = %7, %2
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ret void
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}
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define void @test_dec_and(ptr nocapture %0, ptr readnone %1) {
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; CHECK-LABEL: test_dec_and:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lock decq (%rdi)
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: notb %al
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: sete %cl
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; CHECK-NEXT: orb %al, %cl
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; CHECK-NEXT: testb $1, %cl
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; CHECK-NEXT: je func2 # TAILCALL
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; CHECK-NEXT: # %bb.1:
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; CHECK-NEXT: retq
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%3 = atomicrmw sub ptr %0, i64 1 seq_cst
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%4 = icmp eq i64 %3, 1
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%5 = icmp ne ptr %1, null
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%6 = and i1 %5, %4
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br i1 %6, label %7, label %8
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7: ; preds = %2
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tail call void @func2()
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br label %8
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8: ; preds = %7, %2
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ret void
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}
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define void @test_dec_and_commute(ptr nocapture %0, ptr readnone %1) {
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; CHECK-LABEL: test_dec_and_commute:
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; CHECK: # %bb.0:
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; CHECK-NEXT: lock decq (%rdi)
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; CHECK-NEXT: sete %al
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; CHECK-NEXT: notb %al
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; CHECK-NEXT: testq %rsi, %rsi
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; CHECK-NEXT: sete %cl
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; CHECK-NEXT: orb %al, %cl
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; CHECK-NEXT: testb $1, %cl
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; CHECK-NEXT: je func2 # TAILCALL
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; CHECK-NEXT: # %bb.1:
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; CHECK-NEXT: retq
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%3 = atomicrmw sub ptr %0, i64 1 seq_cst
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%4 = icmp eq i64 %3, 1
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%5 = icmp ne ptr %1, null
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%6 = and i1 %4, %5
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br i1 %6, label %7, label %8
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7: ; preds = %2
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tail call void @func2()
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br label %8
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8: ; preds = %7, %2
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ret void
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}
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declare dso_local void @func2()
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