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rd-mod-wr-eflags.ll
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rd-mod-wr-eflags.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-- | FileCheck %s
%struct.obj = type { i64 }
define dso_local void @_Z7releaseP3obj(%struct.obj* nocapture %o) nounwind uwtable ssp {
; CHECK-LABEL: _Z7releaseP3obj:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: decq (%rdi)
; CHECK-NEXT: je .LBB0_2
; CHECK-NEXT: # %bb.1: # %return
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB0_2: # %if.end
; CHECK-NEXT: jmp free # TAILCALL
entry:
%refcnt = getelementptr inbounds %struct.obj, %struct.obj* %o, i64 0, i32 0
%0 = load i64, i64* %refcnt, align 8
%dec = add i64 %0, -1
store i64 %dec, i64* %refcnt, align 8
%tobool = icmp eq i64 %dec, 0
br i1 %tobool, label %if.end, label %return
if.end: ; preds = %entry
%1 = bitcast %struct.obj* %o to i8*
tail call void @free(i8* %1)
br label %return
return: ; preds = %entry, %if.end
ret void
}
@c = common dso_local global i64 0, align 8
@a = common dso_local global i32 0, align 4
@.str = private unnamed_addr constant [5 x i8] c"%ld\0A\00", align 1
@b = common dso_local global i32 0, align 4
define dso_local i32 @test() nounwind uwtable ssp {
; CHECK-LABEL: test:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: movq c(%rip), %rsi
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: decq %rsi
; CHECK-NEXT: movq %rsi, c(%rip)
; CHECK-NEXT: setne %al
; CHECK-NEXT: movl %eax, a(%rip)
; CHECK-NEXT: movl $.L.str, %edi
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: callq printf@PLT
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
%0 = load i64, i64* @c, align 8
%dec.i = add nsw i64 %0, -1
store i64 %dec.i, i64* @c, align 8
%tobool.i = icmp ne i64 %dec.i, 0
%lor.ext.i = zext i1 %tobool.i to i32
store i32 %lor.ext.i, i32* @a, align 4
%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
ret i32 0
}
define dso_local i32 @test2() nounwind uwtable ssp {
; CHECK-LABEL: test2:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: .cfi_def_cfa_offset 16
; CHECK-NEXT: movq c(%rip), %rsi
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: addq $-1, %rsi
; CHECK-NEXT: setb %al
; CHECK-NEXT: movq %rsi, c(%rip)
; CHECK-NEXT: movl %eax, a(%rip)
; CHECK-NEXT: movl $.L.str, %edi
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: callq printf@PLT
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: popq %rcx
; CHECK-NEXT: .cfi_def_cfa_offset 8
; CHECK-NEXT: retq
entry:
%0 = load i64, i64* @c, align 8
%dec.i = add nsw i64 %0, -1
store i64 %dec.i, i64* @c, align 8
%tobool.i = icmp ne i64 %0, 0
%lor.ext.i = zext i1 %tobool.i to i32
store i32 %lor.ext.i, i32* @a, align 4
%call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([5 x i8], [5 x i8]* @.str, i64 0, i64 0), i64 %dec.i) nounwind
ret i32 0
}
declare i32 @printf(i8* nocapture, ...) nounwind
declare dso_local void @free(i8* nocapture) nounwind
%struct.obj2 = type { i64, i32, i16, i8 }
declare dso_local void @other(%struct.obj2* ) nounwind;
define dso_local void @example_dec(%struct.obj2* %o) nounwind uwtable ssp {
; 64 bit dec
; CHECK-LABEL: example_dec:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: decq (%rdi)
; CHECK-NEXT: jne .LBB3_4
; CHECK-NEXT: # %bb.1: # %if.end
; CHECK-NEXT: decl 8(%rdi)
; CHECK-NEXT: jne .LBB3_4
; CHECK-NEXT: # %bb.2: # %if.end1
; CHECK-NEXT: decw 12(%rdi)
; CHECK-NEXT: jne .LBB3_4
; CHECK-NEXT: # %bb.3: # %if.end2
; CHECK-NEXT: decb 14(%rdi)
; CHECK-NEXT: je .LBB3_5
; CHECK-NEXT: .LBB3_4: # %return
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB3_5: # %if.end4
; CHECK-NEXT: jmp other # TAILCALL
entry:
%s64 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 0
%0 = load i64, i64* %s64, align 8
%dec = add i64 %0, -1
store i64 %dec, i64* %s64, align 8
%tobool = icmp eq i64 %dec, 0
br i1 %tobool, label %if.end, label %return
; 32 bit dec
if.end:
%s32 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 1
%1 = load i32, i32* %s32, align 4
%dec1 = add i32 %1, -1
store i32 %dec1, i32* %s32, align 4
%tobool2 = icmp eq i32 %dec1, 0
br i1 %tobool2, label %if.end1, label %return
; 16 bit dec
if.end1:
%s16 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 2
%2 = load i16, i16* %s16, align 2
%dec2 = add i16 %2, -1
store i16 %dec2, i16* %s16, align 2
%tobool3 = icmp eq i16 %dec2, 0
br i1 %tobool3, label %if.end2, label %return
; 8 bit dec
if.end2:
%s8 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 3
%3 = load i8, i8* %s8
%dec3 = add i8 %3, -1
store i8 %dec3, i8* %s8
%tobool4 = icmp eq i8 %dec3, 0
br i1 %tobool4, label %if.end4, label %return
if.end4:
tail call void @other(%struct.obj2* %o) nounwind
br label %return
return: ; preds = %if.end4, %if.end, %entry
ret void
}
define dso_local void @example_inc(%struct.obj2* %o) nounwind uwtable ssp {
; 64 bit inc
; CHECK-LABEL: example_inc:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: incq (%rdi)
; CHECK-NEXT: jne .LBB4_4
; CHECK-NEXT: # %bb.1: # %if.end
; CHECK-NEXT: incl 8(%rdi)
; CHECK-NEXT: jne .LBB4_4
; CHECK-NEXT: # %bb.2: # %if.end1
; CHECK-NEXT: incw 12(%rdi)
; CHECK-NEXT: jne .LBB4_4
; CHECK-NEXT: # %bb.3: # %if.end2
; CHECK-NEXT: incb 14(%rdi)
; CHECK-NEXT: jne .LBB4_4
; CHECK-NEXT: # %bb.5: # %if.end4
; CHECK-NEXT: jmp other # TAILCALL
; CHECK-NEXT: .LBB4_4: # %return
; CHECK-NEXT: retq
entry:
%s64 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 0
%0 = load i64, i64* %s64, align 8
%inc = add i64 %0, 1
store i64 %inc, i64* %s64, align 8
%tobool = icmp eq i64 %inc, 0
br i1 %tobool, label %if.end, label %return
; 32 bit inc
if.end:
%s32 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 1
%1 = load i32, i32* %s32, align 4
%inc1 = add i32 %1, 1
store i32 %inc1, i32* %s32, align 4
%tobool2 = icmp eq i32 %inc1, 0
br i1 %tobool2, label %if.end1, label %return
; 16 bit inc
if.end1:
%s16 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 2
%2 = load i16, i16* %s16, align 2
%inc2 = add i16 %2, 1
store i16 %inc2, i16* %s16, align 2
%tobool3 = icmp eq i16 %inc2, 0
br i1 %tobool3, label %if.end2, label %return
; 8 bit inc
if.end2:
%s8 = getelementptr inbounds %struct.obj2, %struct.obj2* %o, i64 0, i32 3
%3 = load i8, i8* %s8
%inc3 = add i8 %3, 1
store i8 %inc3, i8* %s8
%tobool4 = icmp eq i8 %inc3, 0
br i1 %tobool4, label %if.end4, label %return
if.end4:
tail call void @other(%struct.obj2* %o) nounwind
br label %return
return:
ret void
}
; Deal with TokenFactor chain
; rdar://11236106
@foo = external dso_local global i64*, align 8
define dso_local void @test3() nounwind ssp {
; CHECK-LABEL: test3:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: movq foo(%rip), %rax
; CHECK-NEXT: decq 16(%rax)
; CHECK-NEXT: je .LBB5_2
; CHECK-NEXT: # %bb.1: # %if.end
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB5_2: # %if.then
; CHECK-NEXT: jmp baz # TAILCALL
entry:
%0 = load i64*, i64** @foo, align 8
%arrayidx = getelementptr inbounds i64, i64* %0, i64 2
%1 = load i64, i64* %arrayidx, align 8
%dec = add i64 %1, -1
store i64 %dec, i64* %arrayidx, align 8
%cmp = icmp eq i64 %dec, 0
br i1 %cmp, label %if.then, label %if.end
if.then:
tail call void @baz() nounwind
br label %if.end
if.end:
ret void
}
declare dso_local void @baz()
; Avoid creating a cycle in the DAG which would trigger an assert in the
; scheduler.
; PR12565
; rdar://11451474
@x = external dso_local global i32, align 4
@y = external dso_local global i32, align 4
@z = external dso_local global i32, align 4
define dso_local void @test4() nounwind uwtable ssp {
; CHECK-LABEL: test4:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: xorl %eax, %eax
; CHECK-NEXT: decl y(%rip)
; CHECK-NEXT: je .LBB6_2
; CHECK-NEXT: # %bb.1: # %entry
; CHECK-NEXT: movl x(%rip), %eax
; CHECK-NEXT: .LBB6_2: # %entry
; CHECK-NEXT: movl %eax, z(%rip)
; CHECK-NEXT: retq
entry:
%0 = load i32, i32* @x, align 4
%1 = load i32, i32* @y, align 4
%dec = add nsw i32 %1, -1
store i32 %dec, i32* @y, align 4
%tobool.i = icmp ne i32 %dec, 0
%cond.i = select i1 %tobool.i, i32 %0, i32 0
store i32 %cond.i, i32* @z, align 4
ret void
}